Revert "[iOS][multiball] Move AppURLLoadingServiceDelegate to Scene."

This reverts commit 4a58461b.

Reason for revert: broke compilation on iOS
https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8891643701272051152/+/steps/compile/0/stdout

Original change's description:
> [iOS][multiball] Move AppURLLoadingServiceDelegate to Scene.
> 
> Moves AppURLLoadingServiceDelegate from Main to Scene Controller.
> * adds SceneControllerGuts temporary interface to expose scene-level
> internals to MainController while the code is moved.
> 
> Bug: None
> Change-Id: I0c7dbe077a94ff5b9c598c401c9c7340cc8f969c
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1983226
> Commit-Queue: Stepan Khapugin <stkhapugin@chromium.org>
> Reviewed-by: Mark Cogan <marq@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#730151}

TBR=marq@chromium.org,stkhapugin@chromium.org

Change-Id: I65d0afac9c2296574c324784960b36ecb1802b43
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: None
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1995171Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Commit-Queue: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#730160}

ios/chrome/app/BUILD.gn

@@ -233,7 +233,6 @@ source_set("app_internal") {
     "//ios/chrome/browser/ui/history",
     "//ios/chrome/browser/ui/main",
     "//ios/chrome/browser/ui/main:scene",
-    "//ios/chrome/browser/ui/main:scene_guts",
     "//ios/chrome/browser/ui/promos",
     "//ios/chrome/browser/ui/settings",
     "//ios/chrome/browser/ui/settings:settings_root",

ios/chrome/app/main_application_delegate.mm

@@ -86,7 +86,6 @@
       _sceneController =
           [[SceneController alloc] initWithSceneState:_sceneState];
 
-      // TODO(crbug.com/1040501): remove this.
       // This is temporary plumbing that's not supposed to be here.
       _sceneController.mainController = (id<MainControllerGuts>)_mainController;
       _mainController.sceneController = _sceneController;

ios/chrome/app/main_controller.h

@@ -17,9 +17,7 @@
 
 @class AppState;
 @class MetricsMediator;
-@protocol AppURLLoadingServiceDelegate;
 @protocol BrowsingDataCommands;
-@protocol SceneControllerGuts;
 @protocol TabSwitcherDelegate;
 
 // The main controller of the application, owned by the MainWindow nib. Also
@@ -47,10 +45,7 @@
 @property(nonatomic, weak) MetricsMediator* metricsMediator;
 
 // For temporary plumbing only.
-@property(nonatomic, weak) id<ApplicationCommands,
-                              TabSwitcherDelegate,
-                              AppURLLoadingServiceDelegate,
-                              SceneControllerGuts>
+@property(nonatomic, weak) id<ApplicationCommands, TabSwitcherDelegate>
     sceneController;
 
 @end

ios/chrome/app/main_controller.mm

@@ -75,6 +75,7 @@
 #include "ios/chrome/browser/content_settings/host_content_settings_map_factory.h"
 #include "ios/chrome/browser/crash_report/breakpad_helper.h"
 #include "ios/chrome/browser/crash_report/crash_loop_detection_util.h"
+#import "ios/chrome/browser/crash_report/crash_restore_helper.h"
 #include "ios/chrome/browser/download/download_directory_util.h"
 #import "ios/chrome/browser/external_files/external_file_remover_factory.h"
 #import "ios/chrome/browser/external_files/external_file_remover_impl.h"
@@ -90,6 +91,7 @@
 #include "ios/chrome/browser/metrics/first_user_action_recorder.h"
 #import "ios/chrome/browser/metrics/previous_session_info.h"
 #import "ios/chrome/browser/net/cookie_util.h"
+#include "ios/chrome/browser/ntp/features.h"
 #include "ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.h"
 #include "ios/chrome/browser/payments/ios_payment_instrument_launcher.h"
 #include "ios/chrome/browser/payments/ios_payment_instrument_launcher_factory.h"
@@ -124,7 +126,6 @@
 #import "ios/chrome/browser/ui/first_run/welcome_to_chrome_view_controller.h"
 #include "ios/chrome/browser/ui/history/history_coordinator.h"
 #import "ios/chrome/browser/ui/main/browser_view_wrangler.h"
-#import "ios/chrome/browser/ui/main/scene_controller_guts.h"
 #import "ios/chrome/browser/ui/promos/signin_promo_view_controller.h"
 #import "ios/chrome/browser/ui/settings/settings_navigation_controller.h"
 #import "ios/chrome/browser/ui/signin_interaction/signin_interaction_coordinator.h"
@@ -238,6 +239,11 @@ void RegisterComponentsForUpdate() {
       cus, GetApplicationContext()->GetApplicationLocale());
 }
 
+// Used to update the current BVC mode if a new tab is added while the tab
+// switcher view is being dimissed.  This is different than ApplicationMode in
+// that it can be set to |NONE| when not in use.
+enum class TabSwitcherDismissalMode { NONE, NORMAL, INCOGNITO };
+
 // The delay, in seconds, for cleaning external files.
 const int kExternalFilesCleanupDelaySeconds = 60;
 
@@ -280,7 +286,8 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
 
 }  // namespace
 
-@interface MainController () <BrowserStateStorageSwitching,
+@interface MainController () <AppURLLoadingServiceDelegate,
+                              BrowserStateStorageSwitching,
                               PrefObserverDelegate,
                               WebStateListObserving> {
   IBOutlet UIWindow* _window;
@@ -296,13 +303,27 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   // BrowserViewInformation protocol.
   BrowserViewWrangler* _browserViewWrangler;
 
+  // Parameters received at startup time when the app is launched from another
+  // app.
+  AppStartupParameters* _startupParameters;
+
   // TabSwitcher object -- the tab grid.
   id<TabSwitcher> _tabSwitcher;
 
+  // YES while animating the dismissal of tab switcher.
+  BOOL _dismissingTabSwitcher;
+
+  // If not NONE, the current BVC should be switched to this BVC on completion
+  // of tab switcher dismissal.
+  TabSwitcherDismissalMode _modeToDisplayOnTabSwitcherDismissal;
+
   // True if the current session began from a cold start. False if the app has
   // entered the background at least once since start up.
   BOOL _isColdStart;
 
+  // Keeps track of the restore state during startup.
+  CrashRestoreHelper* _restoreHelper;
+
   // An object to record metrics related to the user's first action.
   std::unique_ptr<FirstUserActionRecorder> _firstUserActionRecorder;
 
@@ -351,6 +372,22 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
 // browser has started up to the FOREGROUND stage.
 @property(nonatomic, readonly) TabGridCoordinator* mainCoordinator;
 
+// A property to track whether the QR Scanner should be started upon tab
+// switcher dismissal. It can only be YES if the QR Scanner experiment is
+// enabled.
+@property(nonatomic, readwrite)
+    NTPTabOpeningPostOpeningAction NTPActionAfterTabSwitcherDismissal;
+
+// Returns YES if the settings are presented, either from
+// self.settingsNavigationController or from SigninInteractionCoordinator.
+@property(nonatomic, assign, readonly, getter=isSettingsViewPresented)
+    BOOL settingsViewPresented;
+
+// Activates |mainBVC| and |otrBVC| and sets |currentBVC| as primary iff
+// |currentBVC| can be made active.
+- (void)activateBVCAndMakeCurrentBVCPrimary;
+// Sets |currentBVC| as the root view controller for the window.
+- (void)displayCurrentBVCAndFocusOmnibox:(BOOL)focusOmnibox;
 // Shows the tab switcher UI.
 - (void)showTabSwitcher;
 // Starts a voice search on the current BVC.
@@ -359,6 +396,26 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
 - (void)lastIncognitoTabClosed;
 // Called when the last regular tab was closed.
 - (void)lastRegularTabClosed;
+// Opens a tab in the target BVC, and switches to it in a way that's appropriate
+// to the current UI, based on the |dismissModals| flag:
+// - If a modal dialog is showing and |dismissModals| is NO, the selected tab of
+// the main tab model will change in the background, but the view won't change.
+// - Otherwise, any modal view will be dismissed, the tab switcher will animate
+// out if it is showing, the target BVC will become active, and the new tab will
+// be shown.
+// If the current tab in |targetMode| is a NTP, it can be reused to open URL.
+// |completion| is executed after the tab is opened. After Tab is open the
+// virtual URL is set to the pending navigation item.
+- (void)openSelectedTabInMode:(ApplicationModeForTabOpening)targetMode
+            withUrlLoadParams:(const UrlLoadParams&)urlLoadParams
+                   completion:(ProceduralBlock)completion;
+// Checks the target BVC's current tab's URL. If this URL is chrome://newtab,
+// loads |urlLoadParams| in this tab. Otherwise, open |urlLoadParams| in a new
+// tab in the target BVC. |tabDisplayedCompletion| will be called on the new tab
+// (if not nil).
+- (void)openOrReuseTabInMode:(ApplicationMode)targetMode
+           withUrlLoadParams:(const UrlLoadParams&)urlLoadParams
+         tabOpenedCompletion:(ProceduralBlock)tabOpenedCompletion;
 // Returns whether the restore infobar should be displayed.
 - (bool)mustShowRestoreInfobar;
 // Switch all global states for the given mode (normal or incognito).
@@ -450,8 +507,6 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
 @synthesize isProcessingTabSwitcherCommand;
 @synthesize isProcessingVoiceSearchCommand;
 @synthesize signinInteractionCoordinator;
-@synthesize dismissingTabSwitcher = _dismissingTabSwitcher;
-@synthesize restoreHelper = _restoreHelper;
 
 // Defined by public protocols.
 // - BrowserLauncher
@@ -467,8 +522,6 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
 @synthesize NTPActionAfterTabSwitcherDismissal =
     _NTPActionAfterTabSwitcherDismissal;
 @synthesize tabSwitcherIsActive;
-@synthesize modeToDisplayOnTabSwitcherDismissal =
-    _modeToDisplayOnTabSwitcherDismissal;
 
 #pragma mark - Application lifecycle
 
@@ -591,17 +644,17 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
       _browserStateManager->GetLastUsedBrowserState();
 
   // The CrashRestoreHelper must clean up the old browser state information
-  // before the tabModels can be created.  |self.restoreHelper| must be kept
-  // alive until the BVC receives the browser state and tab model.
+  // before the tabModels can be created.  |_restoreHelper| must be kept alive
+  // until the BVC receives the browser state and tab model.
   BOOL postCrashLaunch = [self mustShowRestoreInfobar];
   if (postCrashLaunch) {
-    self.restoreHelper =
+    _restoreHelper =
         [[CrashRestoreHelper alloc] initWithBrowserState:chromeBrowserState];
-    [self.restoreHelper moveAsideSessionInformation];
+    [_restoreHelper moveAsideSessionInformation];
   }
 
   self.appURLLoadingService = new AppUrlLoadingService();
-  self.appURLLoadingService->SetDelegate(self.sceneController);
+  self.appURLLoadingService->SetDelegate(self);
 
   // Initialize and set the main browser state.
   [self initializeBrowserState:chromeBrowserState];
@@ -684,16 +737,16 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
                         appState:self.appState];
   _launchOptions = nil;
 
-  if (!self.startupParameters) {
+  if (!_startupParameters) {
     // The startup parameters may create new tabs or navigations. If the restore
     // infobar is displayed now, it may be dismissed immediately and the user
     // will never be able to restore the session.
     TabModel* currentTabModel = [self currentTabModel];
-    [self.restoreHelper
+    [_restoreHelper
         showRestoreIfNeededUsingWebState:currentTabModel.webStateList
                                              ->GetActiveWebState()
                          sessionRestorer:currentTabModel];
-    self.restoreHelper = nil;
+    _restoreHelper = nil;
   }
 
   [self scheduleTasksRequiringBVCWithBrowserState];
@@ -719,9 +772,9 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
 
   [self markEulaAsAccepted];
 
-  if (self.startupParameters) {
+  if (_startupParameters) {
     UrlLoadParams params =
-        UrlLoadParams::InNewTab(self.startupParameters.externalURL);
+        UrlLoadParams::InNewTab(_startupParameters.externalURL);
     [self dismissModalsAndOpenSelectedTabInMode:ApplicationModeForTabOpening::
                                                     NORMAL
                               withUrlLoadParams:params
@@ -1277,14 +1330,13 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   TabModel* tabModel;
   if (launchMode == ApplicationMode::INCOGNITO) {
     tabModel = otrTabModel;
-    [self.sceneController
-        setCurrentInterfaceForMode:ApplicationMode::INCOGNITO];
+    [self setCurrentInterfaceForMode:ApplicationMode::INCOGNITO];
   } else {
     tabModel = mainTabModel;
-    [self.sceneController setCurrentInterfaceForMode:ApplicationMode::NORMAL];
+    [self setCurrentInterfaceForMode:ApplicationMode::NORMAL];
   }
   if (self.tabSwitcherIsActive) {
-    DCHECK(!self.dismissingTabSwitcher);
+    DCHECK(!_dismissingTabSwitcher);
     [self beginDismissingTabSwitcherWithCurrentModel:self.mainTabModel
                                         focusOmnibox:NO];
     [self finishDismissingTabSwitcher];
@@ -1299,7 +1351,7 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   if (firstRun) {
     [self showFirstRunUI];
     // Do not ever show the 'restore' infobar during first run.
-    self.restoreHelper = nil;
+    _restoreHelper = nil;
   }
 }
 
@@ -1356,7 +1408,7 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   if (self.currentBVC == self.otrBVC)
     return;
   // Don't show promos if the app was launched from a URL.
-  if (self.startupParameters)
+  if (_startupParameters)
     return;
 
   // Show the sign-in promo if needed
@@ -1405,6 +1457,26 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
 
 
 
+#pragma mark - AppURLLoadingServiceDelegate
+
+- (void)openURLInNewTabWithCommand:(OpenNewTabCommand*)command {
+  [self openURLInNewTab:command];
+}
+
+- (void)expectNewForegroundTabForMode:(ApplicationMode)targetMode {
+  id<BrowserInterface> interface =
+      targetMode == ApplicationMode::INCOGNITO
+          ? self.interfaceProvider.incognitoInterface
+          : self.interfaceProvider.mainInterface;
+  DCHECK(interface);
+  [interface.bvc expectNewForegroundTab];
+}
+
+- (void)openNewTabFromOriginPoint:(CGPoint)originPoint
+                     focusOmnibox:(BOOL)focusOmnibox {
+  [self.currentBVC openNewTabFromOriginPoint:originPoint
+                                focusOmnibox:focusOmnibox];
+}
 
 #pragma mark - Preferences Management
 
@@ -1443,7 +1515,34 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   return self.interfaceProvider.currentInterface.bvc;
 }
 
+// Note that the current tab of |browserCoordinator|'s BVC will normally be
+// reloaded by this method. If a new tab is about to be added, call
+// expectNewForegroundTab on the BVC first to avoid extra work and possible page
+// load side-effects for the tab being replaced.
+- (void)setCurrentInterfaceForMode:(ApplicationMode)mode {
+  DCHECK(self.interfaceProvider);
+  BOOL incognitio = mode == ApplicationMode::INCOGNITO;
+  id<BrowserInterface> currentInterface =
+      self.interfaceProvider.currentInterface;
+  id<BrowserInterface> newInterface =
+      incognitio ? self.interfaceProvider.incognitoInterface
+                 : self.interfaceProvider.mainInterface;
+  if (currentInterface && currentInterface == newInterface)
+    return;
+
+  // Update the snapshot before switching another application mode.  This
+  // ensures that the snapshot is correct when links are opened in a different
+  // application mode.
+  [self updateActiveWebStateSnapshot];
 
+  self.interfaceProvider.currentInterface = newInterface;
+
+  if (!_dismissingTabSwitcher)
+    [self displayCurrentBVCAndFocusOmnibox:NO];
+
+  // Tell the BVC that was made current that it can use the web.
+  [self activateBVCAndMakeCurrentBVCPrimary];
+}
 
 #pragma mark - Tab closure handlers
 
@@ -1476,7 +1575,7 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   if ([self.currentTabModel count] == 0U) {
     [self showTabSwitcher];
   } else {
-    [self.sceneController setCurrentInterfaceForMode:ApplicationMode::NORMAL];
+    [self setCurrentInterfaceForMode:ApplicationMode::NORMAL];
   }
 }
 
@@ -1581,14 +1680,14 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
                                       focusOmnibox:(BOOL)focusOmnibox {
   DCHECK(tabModel == self.mainTabModel || tabModel == self.otrTabModel);
 
-  self.dismissingTabSwitcher = YES;
+  _dismissingTabSwitcher = YES;
   ApplicationMode mode = (tabModel == self.mainTabModel)
                              ? ApplicationMode::NORMAL
                              : ApplicationMode::INCOGNITO;
-  [self.sceneController setCurrentInterfaceForMode:mode];
+  [self setCurrentInterfaceForMode:mode];
 
   // The call to set currentBVC above does not actually display the BVC, because
-  // self.dismissingTabSwitcher is YES.  So: Force the BVC transition to start.
+  // _dismissingTabSwitcher is YES.  So: Force the BVC transition to start.
   [self displayCurrentBVCAndFocusOmnibox:focusOmnibox];
 }
 
@@ -1603,8 +1702,8 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   // user to the tab switcher.
   if (self.currentTabModel.count == 0U) {
     self.tabSwitcherIsActive = NO;
-    self.dismissingTabSwitcher = NO;
-    self.modeToDisplayOnTabSwitcherDismissal = TabSwitcherDismissalMode::NONE;
+    _dismissingTabSwitcher = NO;
+    _modeToDisplayOnTabSwitcherDismissal = TabSwitcherDismissalMode::NONE;
     self.NTPActionAfterTabSwitcherDismissal = NO_ACTION;
     [self showTabSwitcher];
     return;
@@ -1615,16 +1714,15 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   // animations begin, so it should be the current active VC at this point.
   DCHECK_EQ(self.mainCoordinator.activeViewController, self.currentBVC);
 
-  if (self.modeToDisplayOnTabSwitcherDismissal ==
+  if (_modeToDisplayOnTabSwitcherDismissal ==
       TabSwitcherDismissalMode::NORMAL) {
-    [self.sceneController setCurrentInterfaceForMode:ApplicationMode::NORMAL];
-  } else if (self.modeToDisplayOnTabSwitcherDismissal ==
+    [self setCurrentInterfaceForMode:ApplicationMode::NORMAL];
+  } else if (_modeToDisplayOnTabSwitcherDismissal ==
              TabSwitcherDismissalMode::INCOGNITO) {
-    [self.sceneController
-        setCurrentInterfaceForMode:ApplicationMode::INCOGNITO];
+    [self setCurrentInterfaceForMode:ApplicationMode::INCOGNITO];
   }
 
-  self.modeToDisplayOnTabSwitcherDismissal = TabSwitcherDismissalMode::NONE;
+  _modeToDisplayOnTabSwitcherDismissal = TabSwitcherDismissalMode::NONE;
 
   ProceduralBlock action = [self completionBlockForTriggeringAction:
                                      self.NTPActionAfterTabSwitcherDismissal];
@@ -1634,10 +1732,11 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   }
 
   self.tabSwitcherIsActive = NO;
-  self.dismissingTabSwitcher = NO;
+  _dismissingTabSwitcher = NO;
 }
 
-#pragma mark - App Navigation
+
+#pragma mark - Navigation Controllers
 
 - (void)presentSignedInAccountsViewControllerForBrowserState:
     (ios::ChromeBrowserState*)browserState {
@@ -1653,7 +1752,32 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
 
 - (void)closeSettingsAnimated:(BOOL)animated
                    completion:(ProceduralBlock)completion {
-  [self.sceneController closeSettingsAnimated:animated completion:completion];
+  if (self.settingsNavigationController) {
+    [self.settingsNavigationController cleanUpSettings];
+    UIViewController* presentingViewController =
+        [self.settingsNavigationController presentingViewController];
+    // If presentingViewController is nil it means the VC was already dismissed
+    // by some other action like swiping down.
+    DCHECK(presentingViewController);
+    [presentingViewController dismissViewControllerAnimated:animated
+                                                 completion:completion];
+    self.settingsNavigationController = nil;
+    return;
+  }
+  // |self.signinInteractionCoordinator| can also present settings, like
+  // the advanced sign-in settings navigation controller. If the settings has
+  // to be cloase, it is thus the responsibility of the main controller to
+  // dismiss the the advanced sign-in settings by dismssing the settings
+  // presented by |self.signinInteractionCoordinator|.
+  // To reproduce this case:
+  //  - open Bookmark view
+  //  - start sign-in
+  //  - tap on "Settings" to open the advanced sign-in settings
+  //  - tap on "Manage Your Google Account"
+  DCHECK(self.signinInteractionCoordinator.isSettingsViewPresented);
+  [self.signinInteractionCoordinator
+      abortAndDismissSettingsViewAnimated:animated
+                               completion:completion];
 }
 
 #pragma mark - WebStateListObserving
@@ -1678,6 +1802,54 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
 
 #pragma mark - Tab opening utility methods.
 
+- (void)openOrReuseTabInMode:(ApplicationMode)targetMode
+           withUrlLoadParams:(const UrlLoadParams&)urlLoadParams
+         tabOpenedCompletion:(ProceduralBlock)tabOpenedCompletion {
+  BrowserViewController* targetBVC =
+      targetMode == ApplicationMode::NORMAL ? self.mainBVC : self.otrBVC;
+  web::WebState* currentWebState =
+      targetBVC.tabModel.webStateList->GetActiveWebState();
+
+  // Don't call loadWithParams for chrome://newtab when it's already loaded.
+  // Note that it's safe to use -GetVisibleURL here, as it doesn't matter if the
+  // NTP hasn't finished loading.
+  if (currentWebState && IsURLNtp(currentWebState->GetVisibleURL()) &&
+      IsURLNtp(urlLoadParams.web_params.url)) {
+    if (tabOpenedCompletion) {
+      tabOpenedCompletion();
+    }
+    return;
+  }
+
+  // With kBrowserContainerContainsNTP enabled paired with a restored NTP
+  // session, the NTP may appear committed when it is still loading.  For the
+  // time being, always load within a new tab when this feature is enabled.
+  // TODO(crbug.com/931284): Revert this change when fixed.
+  BOOL alwaysInsertNewTab =
+      base::FeatureList::IsEnabled(kBlockNewTabPagePendingLoad);
+  // If the current tab isn't an NTP, open a new tab.  Be sure to use
+  // -GetLastCommittedURL incase the NTP is still loading.
+  if (alwaysInsertNewTab ||
+      !(currentWebState && IsURLNtp(currentWebState->GetVisibleURL()))) {
+    [targetBVC appendTabAddedCompletion:tabOpenedCompletion];
+    UrlLoadParams newTabParams = urlLoadParams;
+    newTabParams.disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
+    newTabParams.in_incognito = targetMode == ApplicationMode::INCOGNITO;
+    UrlLoadingServiceFactory::GetForBrowserState([targetBVC browserState])
+        ->Load(newTabParams);
+    return;
+  }
+
+  // Otherwise, load |urlLoadParams| in the current tab.
+  UrlLoadParams sameTabParams = urlLoadParams;
+  sameTabParams.disposition = WindowOpenDisposition::CURRENT_TAB;
+  UrlLoadingServiceFactory::GetForBrowserState([targetBVC browserState])
+      ->Load(sameTabParams);
+  if (tabOpenedCompletion) {
+    tabOpenedCompletion();
+  }
+}
+
 - (ProceduralBlock)completionBlockForTriggeringAction:
     (NTPTabOpeningPostOpeningAction)action {
   switch (action) {
@@ -1698,6 +1870,164 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   }
 }
 
+- (void)openSelectedTabInMode:(ApplicationModeForTabOpening)tabOpeningTargetMode
+            withUrlLoadParams:(const UrlLoadParams&)urlLoadParams
+                   completion:(ProceduralBlock)completion {
+  // Update the snapshot before opening a new tab. This ensures that the
+  // snapshot is correct when tabs are openned via the dispatcher.
+  [self updateActiveWebStateSnapshot];
+
+  ApplicationMode targetMode;
+
+  if (tabOpeningTargetMode == ApplicationModeForTabOpening::CURRENT) {
+    targetMode = self.interfaceProvider.currentInterface.incognito
+                     ? ApplicationMode::INCOGNITO
+                     : ApplicationMode::NORMAL;
+  } else if (tabOpeningTargetMode == ApplicationModeForTabOpening::NORMAL) {
+    targetMode = ApplicationMode::NORMAL;
+  } else {
+    targetMode = ApplicationMode::INCOGNITO;
+  }
+
+  id<BrowserInterface> targetInterface =
+      targetMode == ApplicationMode::NORMAL
+          ? self.interfaceProvider.mainInterface
+          : self.interfaceProvider.incognitoInterface;
+  NSUInteger tabIndex = NSNotFound;
+  ProceduralBlock startupCompletion =
+      [self completionBlockForTriggeringAction:[_startupParameters
+                                                   postOpeningAction]];
+
+  // Commands are only allowed on NTP.
+  DCHECK(IsURLNtp(urlLoadParams.web_params.url) || !startupCompletion);
+
+  ProceduralBlock tabOpenedCompletion = nil;
+  if (startupCompletion && completion) {
+    tabOpenedCompletion = ^{
+      // Order is important here. |completion| may do cleaning tasks that will
+      // invalidate |startupCompletion|.
+      startupCompletion();
+      completion();
+    };
+  } else if (startupCompletion) {
+    tabOpenedCompletion = startupCompletion;
+  } else {
+    tabOpenedCompletion = completion;
+  }
+
+  if (self.tabSwitcherIsActive) {
+    // If the tab switcher is already being dismissed, simply add the tab and
+    // note that when the tab switcher finishes dismissing, the current BVC
+    // should be switched to be the main BVC if necessary.
+    if (_dismissingTabSwitcher) {
+      _modeToDisplayOnTabSwitcherDismissal =
+          targetMode == ApplicationMode::NORMAL
+              ? TabSwitcherDismissalMode::NORMAL
+              : TabSwitcherDismissalMode::INCOGNITO;
+      [targetInterface.bvc appendTabAddedCompletion:tabOpenedCompletion];
+      UrlLoadParams savedParams = urlLoadParams;
+      savedParams.in_incognito = targetMode == ApplicationMode::INCOGNITO;
+      UrlLoadingServiceFactory::GetForBrowserState(
+          [targetInterface.bvc browserState])
+          ->Load(savedParams);
+    } else {
+      // Voice search, QRScanner and the omnibox are presented by the BVC.
+      // They must be started after the BVC view is added in the hierarchy.
+      self.NTPActionAfterTabSwitcherDismissal =
+          [_startupParameters postOpeningAction];
+      [self setStartupParameters:nil];
+      [_tabSwitcher dismissWithNewTabAnimationToBrowser:targetInterface.browser
+                                      withUrlLoadParams:urlLoadParams
+                                                atIndex:tabIndex];
+    }
+  } else {
+    if (!self.currentBVC.presentedViewController) {
+      [targetInterface.bvc expectNewForegroundTab];
+    }
+    [self setCurrentInterfaceForMode:targetMode];
+    [self openOrReuseTabInMode:targetMode
+             withUrlLoadParams:urlLoadParams
+           tabOpenedCompletion:tabOpenedCompletion];
+  }
+
+  if (_restoreHelper) {
+    // Now that all the operations on the tabs have been done, display the
+    // restore infobar if needed.
+    dispatch_async(dispatch_get_main_queue(), ^{
+      TabModel* currentTabModel = [self currentTabModel];
+      [_restoreHelper
+          showRestoreIfNeededUsingWebState:currentTabModel.webStateList
+                                               ->GetActiveWebState()
+                           sessionRestorer:currentTabModel];
+      _restoreHelper = nil;
+    });
+  }
+}
+
+- (void)dismissModalDialogsWithCompletion:(ProceduralBlock)completion
+                           dismissOmnibox:(BOOL)dismissOmnibox {
+  // Immediately hide modals from the provider (alert views, action sheets,
+  // popovers). They will be ultimately dismissed by their owners, but at least,
+  // they are not visible.
+  ios::GetChromeBrowserProvider()->HideModalViewStack();
+
+  // ChromeIdentityService is responsible for the dialogs displayed by the
+  // services it wraps.
+  ios::GetChromeBrowserProvider()->GetChromeIdentityService()->DismissDialogs();
+
+  // MailtoHandlerProvider is responsible for the dialogs displayed by the
+  // services it wraps.
+  ios::GetChromeBrowserProvider()
+      ->GetMailtoHandlerProvider()
+      ->DismissAllMailtoHandlerInterfaces();
+
+  // Then, depending on what the SSO view controller is presented on, dismiss
+  // it.
+  ProceduralBlock completionWithBVC = ^{
+    DCHECK(self.currentBVC);
+    DCHECK(!self.tabSwitcherIsActive);
+    DCHECK(!self.signinInteractionCoordinator.isActive);
+    // This will dismiss the SSO view controller.
+    [self.interfaceProvider.currentInterface
+        clearPresentedStateWithCompletion:completion
+                           dismissOmnibox:dismissOmnibox];
+  };
+  ProceduralBlock completionWithoutBVC = ^{
+    // |self.currentBVC| may exist but tab switcher should be active.
+    DCHECK(self.tabSwitcherIsActive);
+    // This will dismiss the SSO view controller.
+    [self.signinInteractionCoordinator cancelAndDismiss];
+    // History coordinator can be started on top of the tab grid. This is not
+    // true of the other tab switchers.
+    DCHECK(self.mainCoordinator);
+    [self.mainCoordinator stopChildCoordinatorsWithCompletion:completion];
+  };
+
+  // As a top level rule, if the settings are showing, they need to be
+  // dismissed. Then, based on whether the BVC is present or not, a different
+  // completion callback is called.
+  if (!self.tabSwitcherIsActive && self.isSettingsViewPresented) {
+    // In this case, the settings are up and the BVC is showing. Close the
+    // settings then call the BVC completion.
+    [self closeSettingsAnimated:NO completion:completionWithBVC];
+  } else if (self.isSettingsViewPresented) {
+    // In this case, the settings are up but the BVC is not showing. Close the
+    // settings then call the no-BVC completion.
+    [self closeSettingsAnimated:NO completion:completionWithoutBVC];
+  } else if (![self isTabSwitcherActive]) {
+    // In this case, the settings are not shown but the BVC is showing. Call the
+    // BVC completion.
+    [self.signinInteractionCoordinator cancel];
+    completionWithBVC();
+  } else {
+    // In this case, neither the settings nor the BVC are shown. Call the no-BVC
+    // completion.
+    completionWithoutBVC();
+  }
+
+  // Verify that no modal views are left presented.
+  ios::GetChromeBrowserProvider()->LogIfModalViewsArePresented();
+}
 
 - (bool)mustShowRestoreInfobar {
   if ([self isFirstLaunchAfterUpgrade])
@@ -1715,6 +2045,18 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   return result;
 }
 
+// Asks the respective Snapshot helper to update the snapshot for the active
+// WebState.
+- (void)updateActiveWebStateSnapshot {
+  WebStateList* webStateList = self.currentBVC.tabModel.webStateList;
+  if (webStateList) {
+    web::WebState* webState = webStateList->GetActiveWebState();
+    if (webState) {
+      SnapshotTabHelper::FromWebState(webState)->UpdateSnapshotWithCallback(
+          nil);
+    }
+  }
+}
 
 - (void)purgeSnapshots {
   NSMutableSet* liveSessions = [self liveSessionsForTabModel:self.mainTabModel];
@@ -1745,11 +2087,11 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
                                dismissOmnibox:(BOOL)dismissOmnibox
                                    completion:(ProceduralBlock)completion {
   UrlLoadParams copyOfUrlLoadParams = urlLoadParams;
-  [self.sceneController
+  [self
       dismissModalDialogsWithCompletion:^{
-        [self.sceneController openSelectedTabInMode:targetMode
-                                  withUrlLoadParams:copyOfUrlLoadParams
-                                         completion:completion];
+        [self openSelectedTabInMode:targetMode
+                  withUrlLoadParams:copyOfUrlLoadParams
+                         completion:completion];
       }
                          dismissOmnibox:dismissOmnibox];
 }
@@ -1829,6 +2171,21 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   return [self currentBrowserState] -> IsOffTheRecord();
 }
 
+// This method is temporarily both required in the scene controller and here.
+- (void)openURLInNewTab:(OpenNewTabCommand*)command {
+  UrlLoadParams params =
+      UrlLoadParams::InNewTab(command.URL, command.virtualURL);
+  params.SetInBackground(command.inBackground);
+  params.web_params.referrer = command.referrer;
+  params.in_incognito = command.inIncognito;
+  params.append_to = command.appendTo;
+  params.origin_point = command.originPoint;
+  params.from_chrome = command.fromChrome;
+  params.user_initiated = command.userInitiated;
+  params.should_focus_omnibox = command.shouldFocusOmnibox;
+  self.appURLLoadingService->LoadUrlInNewTab(params);
+}
+
 #pragma mark - BrowsingDataCommands
 
 - (void)removeBrowsingDataForBrowserState:(ios::ChromeBrowserState*)browserState
@@ -1902,12 +2259,6 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
 
 @implementation MainController (TestingOnly)
 
-- (void)dismissModalDialogsWithCompletion:(ProceduralBlock)completion
-                           dismissOmnibox:(BOOL)dismissOmnibox {
-  [self.sceneController dismissModalDialogsWithCompletion:completion
-                                           dismissOmnibox:dismissOmnibox];
-}
-
 - (DeviceSharingManager*)deviceSharingManager {
   return [_browserViewWrangler deviceSharingManager];
 }
@@ -1927,9 +2278,13 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   self.tabSwitcherIsActive = active;
 }
 
+- (BOOL)dismissingTabSwitcher {
+  return _dismissingTabSwitcher;
+}
+
 - (void)setStartupParametersWithURL:(const GURL&)launchURL {
   NSString* sourceApplication = @"Fake App";
-  self.startupParameters = [ChromeAppStartupParameters
+  _startupParameters = [ChromeAppStartupParameters
       newChromeAppStartupParametersWithURL:net::NSURLWithGURL(launchURL)
                      fromSourceApplication:sourceApplication];
 }

ios/chrome/app/main_controller_guts.h

@@ -7,7 +7,6 @@
 
 #import <UIKit/UIKit.h>
 
-#import "ios/chrome/browser/crash_report/crash_restore_helper.h"
 #import "ios/chrome/browser/ui/settings/settings_navigation_controller.h"
 #import "ios/public/provider/chrome/browser/user_feedback/user_feedback_provider.h"
 
@@ -23,11 +22,6 @@ namespace ios {
 class ChromeBrowserState;
 }  // namespace ios
 
-// Used to update the current BVC mode if a new tab is added while the tab
-// switcher view is being dismissed.  This is different than ApplicationMode in
-// that it can be set to |NONE| when not in use.
-enum class TabSwitcherDismissalMode { NONE, NORMAL, INCOGNITO };
-
 // TODO(crbug.com/1012697): Remove this protocol when SceneController is
 // operational. Move the private internals back into MainController, and pass
 // ownership of Scene-related objects to SceneController.
@@ -60,38 +54,10 @@ enum class TabSwitcherDismissalMode { NONE, NORMAL, INCOGNITO };
     SigninInteractionCoordinator* signinInteractionCoordinator;
 
 // If YES, the tab switcher is currently active.
+
 @property(nonatomic, assign, getter=isTabSwitcherActive)
     BOOL tabSwitcherIsActive;
 
-// YES while animating the dismissal of tab switcher.
-@property(nonatomic, assign) BOOL dismissingTabSwitcher;
-
-// Returns YES if the settings are presented, either from
-// self.settingsNavigationController or from SigninInteractionCoordinator.
-@property(nonatomic, assign, readonly, getter=isSettingsViewPresented)
-    BOOL settingsViewPresented;
-
-// If not NONE, the current BVC should be switched to this BVC on completion
-// of tab switcher dismissal.
-@property(nonatomic, assign)
-    TabSwitcherDismissalMode modeToDisplayOnTabSwitcherDismissal;
-
-// A property to track whether the QR Scanner should be started upon tab
-// switcher dismissal. It can only be YES if the QR Scanner experiment is
-// enabled.
-@property(nonatomic, readwrite)
-    NTPTabOpeningPostOpeningAction NTPActionAfterTabSwitcherDismissal;
-
-// Parameters received at startup time when the app is launched from another
-// app.
-@property(nonatomic, strong) AppStartupParameters* startupParameters;
-
-- (ProceduralBlock)completionBlockForTriggeringAction:
-    (NTPTabOpeningPostOpeningAction)action;
-
-// Keeps track of the restore state during startup.
-@property(nonatomic, strong) CrashRestoreHelper* restoreHelper;
-
 - (id<TabSwitcher>)tabSwitcher;
 - (TabModel*)currentTabModel;
 - (id<TabSwitcher>)tabSwitcher;
@@ -104,6 +70,11 @@ enum class TabSwitcherDismissalMode { NONE, NORMAL, INCOGNITO };
 - (id<BrowserInterfaceProvider>)interfaceProvider;
 - (void)startVoiceSearchInCurrentBVC;
 
+- (void)dismissModalDialogsWithCompletion:(ProceduralBlock)completion
+                           dismissOmnibox:(BOOL)dismissOmnibox;
+- (void)closeSettingsAnimated:(BOOL)animated
+                   completion:(ProceduralBlock)completion;
+
 - (void)dismissModalsAndOpenSelectedTabInMode:
             (ApplicationModeForTabOpening)targetMode
                             withUrlLoadParams:
@@ -124,13 +95,6 @@ enum class TabSwitcherDismissalMode { NONE, NORMAL, INCOGNITO };
 // screen and showing the appropriate BVC.
 - (void)finishDismissingTabSwitcher;
 
-// Sets |currentBVC| as the root view controller for the window.
-- (void)displayCurrentBVCAndFocusOmnibox:(BOOL)focusOmnibox;
-
-// Activates |mainBVC| and |otrBVC| and sets |currentBVC| as primary iff
-// |currentBVC| can be made active.
-- (void)activateBVCAndMakeCurrentBVCPrimary;
-
 @end
 
 #endif  // IOS_CHROME_APP_MAIN_CONTROLLER_GUTS_H_

ios/chrome/app/main_controller_private.h

@@ -24,7 +24,10 @@ class GURL;
 // Presents a promo's navigation controller.
 - (void)showPromo:(UIViewController*)promo;
 
-- (BOOL)dismissingTabSwitcher;
+// Dismisses all modal dialogs, excluding the omnibox if |dismissOmnibox| is
+// NO, then call |completion|.
+- (void)dismissModalDialogsWithCompletion:(ProceduralBlock)completion
+                           dismissOmnibox:(BOOL)dismissOmnibox;
 
 @end
 
@@ -39,16 +42,12 @@ class GURL;
 
 // Tab switcher state.
 @property(nonatomic, getter=isTabSwitcherActive) BOOL tabSwitcherActive;
+@property(nonatomic, readonly) BOOL dismissingTabSwitcher;
 
 // Sets the internal startup state to indicate that the launch was triggered
 // by an external app opening the given URL.
 - (void)setStartupParametersWithURL:(const GURL&)launchURL;
 
-// Dismisses all modal dialogs, excluding the omnibox if |dismissOmnibox| is
-// NO, then call |completion|.
-- (void)dismissModalDialogsWithCompletion:(ProceduralBlock)completion
-                           dismissOmnibox:(BOOL)dismissOmnibox;
-
 @end
 
 #endif  // IOS_CHROME_APP_MAIN_CONTROLLER_PRIVATE_H_

ios/chrome/browser/ui/main/BUILD.gn

@@ -4,19 +4,6 @@
 
 import("//ios/build/chrome_build.gni")
 
-source_set("scene_guts") {
-  sources = [
-    "scene_controller_guts.h",
-  ]
-  deps = [
-    "//ios/chrome/app/application_delegate:application_delegate_internal",
-    "//ios/chrome/browser:utils",
-    "//ios/chrome/browser/url_loading",
-  ]
-
-  libs = [ "UIKit.framework" ]
-}
-
 source_set("scene") {
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
@@ -30,18 +17,15 @@ source_set("scene") {
 
   deps = [
     ":main",
-    ":scene_guts",
     "//base",
     "//components/signin/public/identity_manager",
     "//components/url_formatter",
     "//ios/chrome/app:app",
     "//ios/chrome/app/application_delegate:application_delegate_internal",
-    "//ios/chrome/browser",
     "//ios/chrome/browser:chrome_url_constants",
     "//ios/chrome/browser/browser_state",
     "//ios/chrome/browser/browsing_data",
     "//ios/chrome/browser/main",
-    "//ios/chrome/browser/ntp:features",
     "//ios/chrome/browser/signin",
     "//ios/chrome/browser/snapshots",
     "//ios/chrome/browser/tabs:tabs",
@@ -55,9 +39,6 @@ source_set("scene") {
     "//ios/chrome/browser/ui/util:multiwindow_util",
     "//ios/chrome/browser/url_loading",
     "//ios/chrome/browser/web_state_list",
-    "//ios/public/provider/chrome/browser",
-    "//ios/public/provider/chrome/browser/mailto",
-    "//ios/public/provider/chrome/browser/signin",
     "//ios/public/provider/chrome/browser/user_feedback",
   ]
 

ios/chrome/browser/ui/main/scene_controller.h

@@ -9,20 +9,16 @@
 
 #import "ios/chrome/app/application_delegate/tab_switching.h"
 #import "ios/chrome/browser/ui/commands/application_commands.h"
-#import "ios/chrome/browser/ui/main/scene_controller_guts.h"
 #import "ios/chrome/browser/ui/main/scene_state.h"
 #import "ios/chrome/browser/ui/tab_grid/tab_switcher.h"
-#import "ios/chrome/browser/url_loading/app_url_loading_service.h"
 
 @protocol MainControllerGuts;
 
 // The controller object for a scene. Reacts to scene state changes.
-@interface SceneController : NSObject <AppURLLoadingServiceDelegate,
-                                       SceneStateObserver,
+@interface SceneController : NSObject <SceneStateObserver,
                                        ApplicationCommands,
                                        TabSwitcherDelegate,
-                                       TabSwitching,
-                                       SceneControllerGuts>
+                                       TabSwitching>
 
 - (instancetype)init NS_UNAVAILABLE;
 - (instancetype)initWithSceneState:(SceneState*)sceneState

ios/chrome/browser/ui/main/scene_controller.mm

@@ -19,9 +19,7 @@
 #include "ios/chrome/browser/browsing_data/browsing_data_remover.h"
 #include "ios/chrome/browser/browsing_data/browsing_data_remover_factory.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
-#import "ios/chrome/browser/chrome_url_util.h"
 #include "ios/chrome/browser/main/browser.h"
-#include "ios/chrome/browser/ntp/features.h"
 #include "ios/chrome/browser/signin/identity_manager_factory.h"
 #import "ios/chrome/browser/snapshots/snapshot_tab_helper.h"
 #import "ios/chrome/browser/tabs/tab_model.h"
@@ -39,12 +37,7 @@
 #import "ios/chrome/browser/ui/util/uikit_ui_util.h"
 #import "ios/chrome/browser/url_loading/app_url_loading_service.h"
 #import "ios/chrome/browser/url_loading/url_loading_params.h"
-#import "ios/chrome/browser/url_loading/url_loading_service.h"
-#import "ios/chrome/browser/url_loading/url_loading_service_factory.h"
 #import "ios/chrome/browser/web_state_list/web_state_list.h"
-#include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
-#include "ios/public/provider/chrome/browser/mailto/mailto_handler_provider.h"
-#include "ios/public/provider/chrome/browser/signin/chrome_identity_service.h"
 #import "ios/public/provider/chrome/browser/user_feedback/user_feedback_provider.h"
 #import "ios/web/public/web_state.h"
 
@@ -122,10 +115,6 @@ enum class EnterTabSwitcherSnapshotResult {
   return self.mainController.interfaceProvider.incognitoInterface;
 }
 
-- (id<BrowserInterfaceProvider>)interfaceProvider {
-  return self.mainController.interfaceProvider;
-}
-
 #pragma mark - SceneStateObserver
 
 - (void)sceneState:(SceneState*)sceneState
@@ -144,7 +133,8 @@ enum class EnterTabSwitcherSnapshotResult {
 #pragma mark - ApplicationCommands
 
 - (void)dismissModalDialogs {
-  [self dismissModalDialogsWithCompletion:nil dismissOmnibox:YES];
+  [self.mainController dismissModalDialogsWithCompletion:nil
+                                          dismissOmnibox:YES];
 }
 
 - (void)showHistory {
@@ -165,7 +155,7 @@ enum class EnterTabSwitcherSnapshotResult {
 }
 
 - (void)closeSettingsUI {
-  [self closeSettingsAnimated:YES completion:nullptr];
+  [self.mainController closeSettingsAnimated:YES completion:nullptr];
 }
 
 - (void)prepareTabSwitcher {
@@ -523,7 +513,7 @@ enum class EnterTabSwitcherSnapshotResult {
                                                 dismissOmnibox:YES
                                                     completion:nil];
   };
-  [self closeSettingsAnimated:YES completion:completion];
+  [self.mainController closeSettingsAnimated:YES completion:completion];
 }
 
 #pragma mark - UserFeedbackDataSource
@@ -616,335 +606,4 @@ enum class EnterTabSwitcherSnapshotResult {
   return YES;
 }
 
-#pragma mark - AppURLLoadingServiceDelegate
-
-// Note that the current tab of |browserCoordinator|'s BVC will normally be
-// reloaded by this method. If a new tab is about to be added, call
-// expectNewForegroundTab on the BVC first to avoid extra work and possible page
-// load side-effects for the tab being replaced.
-- (void)setCurrentInterfaceForMode:(ApplicationMode)mode {
-  DCHECK(self.interfaceProvider);
-  BOOL incognitio = mode == ApplicationMode::INCOGNITO;
-  id<BrowserInterface> currentInterface =
-      self.interfaceProvider.currentInterface;
-  id<BrowserInterface> newInterface =
-      incognitio ? self.interfaceProvider.incognitoInterface
-                 : self.interfaceProvider.mainInterface;
-  if (currentInterface && currentInterface == newInterface)
-    return;
-
-  // Update the snapshot before switching another application mode.  This
-  // ensures that the snapshot is correct when links are opened in a different
-  // application mode.
-  [self updateActiveWebStateSnapshot];
-
-  self.interfaceProvider.currentInterface = newInterface;
-
-  if (!self.mainController.dismissingTabSwitcher)
-    [self.mainController displayCurrentBVCAndFocusOmnibox:NO];
-
-  // Tell the BVC that was made current that it can use the web.
-  [self.mainController activateBVCAndMakeCurrentBVCPrimary];
-}
-
-- (void)dismissModalDialogsWithCompletion:(ProceduralBlock)completion
-                           dismissOmnibox:(BOOL)dismissOmnibox {
-  // Immediately hide modals from the provider (alert views, action sheets,
-  // popovers). They will be ultimately dismissed by their owners, but at least,
-  // they are not visible.
-  ios::GetChromeBrowserProvider()->HideModalViewStack();
-
-  // ChromeIdentityService is responsible for the dialogs displayed by the
-  // services it wraps.
-  ios::GetChromeBrowserProvider()->GetChromeIdentityService()->DismissDialogs();
-
-  // MailtoHandlerProvider is responsible for the dialogs displayed by the
-  // services it wraps.
-  ios::GetChromeBrowserProvider()
-      ->GetMailtoHandlerProvider()
-      ->DismissAllMailtoHandlerInterfaces();
-
-  // Then, depending on what the SSO view controller is presented on, dismiss
-  // it.
-  ProceduralBlock completionWithBVC = ^{
-    DCHECK(self.mainController.currentBVC);
-    DCHECK(!self.mainController.tabSwitcherIsActive);
-    DCHECK(!self.mainController.signinInteractionCoordinator.isActive);
-    // This will dismiss the SSO view controller.
-    [self.interfaceProvider.currentInterface
-        clearPresentedStateWithCompletion:completion
-                           dismissOmnibox:dismissOmnibox];
-  };
-  ProceduralBlock completionWithoutBVC = ^{
-    // |self.mainController.currentBVC| may exist but tab switcher should be
-    // active.
-    DCHECK(self.mainController.tabSwitcherIsActive);
-    // This will dismiss the SSO view controller.
-    [self.mainController.signinInteractionCoordinator cancelAndDismiss];
-    // History coordinator can be started on top of the tab grid. This is not
-    // true of the other tab switchers.
-    DCHECK(self.mainController.mainCoordinator);
-    [self.mainController.mainCoordinator
-        stopChildCoordinatorsWithCompletion:completion];
-  };
-
-  // As a top level rule, if the settings are showing, they need to be
-  // dismissed. Then, based on whether the BVC is present or not, a different
-  // completion callback is called.
-  if (!self.mainController.tabSwitcherIsActive &&
-      self.mainController.isSettingsViewPresented) {
-    // In this case, the settings are up and the BVC is showing. Close the
-    // settings then call the BVC completion.
-    [self closeSettingsAnimated:NO completion:completionWithBVC];
-  } else if (self.mainController.isSettingsViewPresented) {
-    // In this case, the settings are up but the BVC is not showing. Close the
-    // settings then call the no-BVC completion.
-    [self closeSettingsAnimated:NO completion:completionWithoutBVC];
-  } else if (![self.mainController isTabSwitcherActive]) {
-    // In this case, the settings are not shown but the BVC is showing. Call the
-    // BVC completion.
-    [self.mainController.signinInteractionCoordinator cancel];
-    completionWithBVC();
-  } else {
-    // In this case, neither the settings nor the BVC are shown. Call the no-BVC
-    // completion.
-    completionWithoutBVC();
-  }
-
-  // Verify that no modal views are left presented.
-  ios::GetChromeBrowserProvider()->LogIfModalViewsArePresented();
-}
-
-// Opens a tab in the target BVC, and switches to it in a way that's appropriate
-// to the current UI, based on the |dismissModals| flag:
-// - If a modal dialog is showing and |dismissModals| is NO, the selected tab of
-// the main tab model will change in the background, but the view won't change.
-// - Otherwise, any modal view will be dismissed, the tab switcher will animate
-// out if it is showing, the target BVC will become active, and the new tab will
-// be shown.
-// If the current tab in |targetMode| is a NTP, it can be reused to open URL.
-// |completion| is executed after the tab is opened. After Tab is open the
-// virtual URL is set to the pending navigation item.
-- (void)openSelectedTabInMode:(ApplicationModeForTabOpening)tabOpeningTargetMode
-            withUrlLoadParams:(const UrlLoadParams&)urlLoadParams
-                   completion:(ProceduralBlock)completion {
-  // Update the snapshot before opening a new tab. This ensures that the
-  // snapshot is correct when tabs are openned via the dispatcher.
-  [self updateActiveWebStateSnapshot];
-
-  ApplicationMode targetMode;
-
-  if (tabOpeningTargetMode == ApplicationModeForTabOpening::CURRENT) {
-    targetMode = self.interfaceProvider.currentInterface.incognito
-                     ? ApplicationMode::INCOGNITO
-                     : ApplicationMode::NORMAL;
-  } else if (tabOpeningTargetMode == ApplicationModeForTabOpening::NORMAL) {
-    targetMode = ApplicationMode::NORMAL;
-  } else {
-    targetMode = ApplicationMode::INCOGNITO;
-  }
-
-  id<BrowserInterface> targetInterface =
-      targetMode == ApplicationMode::NORMAL
-          ? self.interfaceProvider.mainInterface
-          : self.interfaceProvider.incognitoInterface;
-  NSUInteger tabIndex = NSNotFound;
-  ProceduralBlock startupCompletion = [self.mainController
-      completionBlockForTriggeringAction:[self.mainController.startupParameters
-                                                 postOpeningAction]];
-
-  // Commands are only allowed on NTP.
-  DCHECK(IsURLNtp(urlLoadParams.web_params.url) || !startupCompletion);
-
-  ProceduralBlock tabOpenedCompletion = nil;
-  if (startupCompletion && completion) {
-    tabOpenedCompletion = ^{
-      // Order is important here. |completion| may do cleaning tasks that will
-      // invalidate |startupCompletion|.
-      startupCompletion();
-      completion();
-    };
-  } else if (startupCompletion) {
-    tabOpenedCompletion = startupCompletion;
-  } else {
-    tabOpenedCompletion = completion;
-  }
-
-  if (self.mainController.tabSwitcherIsActive) {
-    // If the tab switcher is already being dismissed, simply add the tab and
-    // note that when the tab switcher finishes dismissing, the current BVC
-    // should be switched to be the main BVC if necessary.
-    if (self.mainController.dismissingTabSwitcher) {
-      self.mainController.modeToDisplayOnTabSwitcherDismissal =
-          targetMode == ApplicationMode::NORMAL
-              ? TabSwitcherDismissalMode::NORMAL
-              : TabSwitcherDismissalMode::INCOGNITO;
-      [targetInterface.bvc appendTabAddedCompletion:tabOpenedCompletion];
-      UrlLoadParams savedParams = urlLoadParams;
-      savedParams.in_incognito = targetMode == ApplicationMode::INCOGNITO;
-      UrlLoadingServiceFactory::GetForBrowserState(
-          [targetInterface.bvc browserState])
-          ->Load(savedParams);
-    } else {
-      // Voice search, QRScanner and the omnibox are presented by the BVC.
-      // They must be started after the BVC view is added in the hierarchy.
-      self.mainController.NTPActionAfterTabSwitcherDismissal =
-          [self.mainController.startupParameters postOpeningAction];
-      [self.mainController setStartupParameters:nil];
-      [self.mainController.tabSwitcher
-          dismissWithNewTabAnimationToBrowser:targetInterface.browser
-                            withUrlLoadParams:urlLoadParams
-                                      atIndex:tabIndex];
-    }
-  } else {
-    if (!self.mainController.currentBVC.presentedViewController) {
-      [targetInterface.bvc expectNewForegroundTab];
-    }
-    [self setCurrentInterfaceForMode:targetMode];
-    [self openOrReuseTabInMode:targetMode
-             withUrlLoadParams:urlLoadParams
-           tabOpenedCompletion:tabOpenedCompletion];
-  }
-
-  if (self.mainController.restoreHelper) {
-    // Now that all the operations on the tabs have been done, display the
-    // restore infobar if needed.
-    dispatch_async(dispatch_get_main_queue(), ^{
-      TabModel* currentTabModel = [self currentTabModel];
-      [self.mainController.restoreHelper
-          showRestoreIfNeededUsingWebState:currentTabModel.webStateList
-                                               ->GetActiveWebState()
-                           sessionRestorer:currentTabModel];
-      self.mainController.restoreHelper = nil;
-    });
-  }
-}
-
-- (void)openURLInNewTabWithCommand:(OpenNewTabCommand*)command {
-  [self openURLInNewTab:command];
-}
-
-- (void)expectNewForegroundTabForMode:(ApplicationMode)targetMode {
-  id<BrowserInterface> interface =
-      targetMode == ApplicationMode::INCOGNITO
-          ? self.interfaceProvider.incognitoInterface
-          : self.interfaceProvider.mainInterface;
-  DCHECK(interface);
-  [interface.bvc expectNewForegroundTab];
-}
-
-- (void)openNewTabFromOriginPoint:(CGPoint)originPoint
-                     focusOmnibox:(BOOL)focusOmnibox {
-  [self.mainController.currentBVC openNewTabFromOriginPoint:originPoint
-                                               focusOmnibox:focusOmnibox];
-}
-
-- (ios::ChromeBrowserState*)currentBrowserState {
-  return self.mainController.interfaceProvider.currentInterface.browserState;
-}
-
-- (TabModel*)currentTabModel {
-  return self.mainController.interfaceProvider.currentInterface.bvc.tabModel;
-}
-
-// Asks the respective Snapshot helper to update the snapshot for the active
-// WebState.
-- (void)updateActiveWebStateSnapshot {
-  WebStateList* webStateList =
-      self.mainController.currentBVC.tabModel.webStateList;
-  if (webStateList) {
-    web::WebState* webState = webStateList->GetActiveWebState();
-    if (webState) {
-      SnapshotTabHelper::FromWebState(webState)->UpdateSnapshotWithCallback(
-          nil);
-    }
-  }
-}
-
-- (void)closeSettingsAnimated:(BOOL)animated
-                   completion:(ProceduralBlock)completion {
-  if (self.mainController.settingsNavigationController) {
-    [self.mainController.settingsNavigationController cleanUpSettings];
-    UIViewController* presentingViewController =
-        [self.mainController
-                .settingsNavigationController presentingViewController];
-    // If presentingViewController is nil it means the VC was already dismissed
-    // by some other action like swiping down.
-    DCHECK(presentingViewController);
-    [presentingViewController dismissViewControllerAnimated:animated
-                                                 completion:completion];
-    self.mainController.settingsNavigationController = nil;
-    return;
-  }
-  // |self.signinInteractionCoordinator| can also present settings, like
-  // the advanced sign-in settings navigation controller. If the settings has
-  // to be cloase, it is thus the responsibility of the main controller to
-  // dismiss the the advanced sign-in settings by dismssing the settings
-  // presented by |self.signinInteractionCoordinator|.
-  // To reproduce this case:
-  //  - open Bookmark view
-  //  - start sign-in
-  //  - tap on "Settings" to open the advanced sign-in settings
-  //  - tap on "Manage Your Google Account"
-  DCHECK(
-      self.mainController.signinInteractionCoordinator.isSettingsViewPresented);
-  [self.mainController.signinInteractionCoordinator
-      abortAndDismissSettingsViewAnimated:animated
-                               completion:completion];
-}
-
-// Checks the target BVC's current tab's URL. If this URL is chrome://newtab,
-// loads |urlLoadParams| in this tab. Otherwise, open |urlLoadParams| in a new
-// tab in the target BVC. |tabDisplayedCompletion| will be called on the new tab
-// (if not nil).
-- (void)openOrReuseTabInMode:(ApplicationMode)targetMode
-           withUrlLoadParams:(const UrlLoadParams&)urlLoadParams
-         tabOpenedCompletion:(ProceduralBlock)tabOpenedCompletion {
-  BrowserViewController* targetBVC =
-      targetMode == ApplicationMode::NORMAL
-          ? self.mainController.interfaceProvider.mainInterface.bvc
-          : self.mainController.interfaceProvider.incognitoInterface.bvc;
-  web::WebState* currentWebState =
-      targetBVC.tabModel.webStateList->GetActiveWebState();
-
-  // Don't call loadWithParams for chrome://newtab when it's already loaded.
-  // Note that it's safe to use -GetVisibleURL here, as it doesn't matter if the
-  // NTP hasn't finished loading.
-  if (currentWebState && IsURLNtp(currentWebState->GetVisibleURL()) &&
-      IsURLNtp(urlLoadParams.web_params.url)) {
-    if (tabOpenedCompletion) {
-      tabOpenedCompletion();
-    }
-    return;
-  }
-
-  // With kBrowserContainerContainsNTP enabled paired with a restored NTP
-  // session, the NTP may appear committed when it is still loading.  For the
-  // time being, always load within a new tab when this feature is enabled.
-  // TODO(crbug.com/931284): Revert this change when fixed.
-  BOOL alwaysInsertNewTab =
-      base::FeatureList::IsEnabled(kBlockNewTabPagePendingLoad);
-  // If the current tab isn't an NTP, open a new tab.  Be sure to use
-  // -GetLastCommittedURL incase the NTP is still loading.
-  if (alwaysInsertNewTab ||
-      !(currentWebState && IsURLNtp(currentWebState->GetVisibleURL()))) {
-    [targetBVC appendTabAddedCompletion:tabOpenedCompletion];
-    UrlLoadParams newTabParams = urlLoadParams;
-    newTabParams.disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
-    newTabParams.in_incognito = targetMode == ApplicationMode::INCOGNITO;
-    UrlLoadingServiceFactory::GetForBrowserState([targetBVC browserState])
-        ->Load(newTabParams);
-    return;
-  }
-
-  // Otherwise, load |urlLoadParams| in the current tab.
-  UrlLoadParams sameTabParams = urlLoadParams;
-  sameTabParams.disposition = WindowOpenDisposition::CURRENT_TAB;
-  UrlLoadingServiceFactory::GetForBrowserState([targetBVC browserState])
-      ->Load(sameTabParams);
-  if (tabOpenedCompletion) {
-    tabOpenedCompletion();
-  }
-}
-
 @end

ios/chrome/browser/ui/main/scene_controller_guts.h

-// Copyright 2019 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_MAIN_SCENE_CONTROLLER_GUTS_H_
-#define IOS_CHROME_BROWSER_UI_MAIN_SCENE_CONTROLLER_GUTS_H_
-
-#import <UIKit/UIKit.h>
-
-#import "ios/chrome/app/application_delegate/tab_opening.h"
-#import "ios/chrome/browser/procedural_block_types.h"
-#import "ios/chrome/browser/url_loading/url_loading_params.h"
-
-@protocol SceneControllerGuts
-
-- (void)closeSettingsAnimated:(BOOL)animated
-                   completion:(ProceduralBlock)completion;
-
-- (void)dismissModalDialogsWithCompletion:(ProceduralBlock)completion
-                           dismissOmnibox:(BOOL)dismissOmnibox;
-
-- (void)openSelectedTabInMode:(ApplicationModeForTabOpening)tabOpeningTargetMode
-            withUrlLoadParams:(const UrlLoadParams&)urlLoadParams
-                   completion:(ProceduralBlock)completion;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_MAIN_SCENE_CONTROLLER_GUTS_H_