[ios] Presents CBD modally from HistoryCoordinator.

-This CL re-introduces the ClearBrowsingData modal presentation from HistoryCoordinator
via HistoryTableVC.

-Creates a new displayPrivacySettings localDispatcher command.

Bug: 805192
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ia62f7f491b39e49c7d90bffb8bf42504ff343a13
Reviewed-on: https://chromium-review.googlesource.com/1026873Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553611}

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

@@ -120,7 +120,6 @@ source_set("history_ui") {
     "//ios/chrome/browser/sync",
     "//ios/chrome/browser/ui",
     "//ios/chrome/browser/ui/collection_view/cells",
-    "//ios/chrome/browser/ui/commands",
     "//ios/chrome/browser/ui/context_menu",
     "//ios/chrome/browser/ui/list_model",
     "//ios/chrome/browser/ui/table_view",

ios/chrome/browser/ui/history/history_coordinator.mm

@@ -11,6 +11,7 @@
 #include "components/keyed_service/core/service_access_type.h"
 #include "ios/chrome/browser/history/history_service_factory.h"
 #include "ios/chrome/browser/sync/ios_chrome_profile_sync_service_factory.h"
+#import "ios/chrome/browser/ui/commands/application_commands.h"
 #include "ios/chrome/browser/ui/history/history_local_commands.h"
 #include "ios/chrome/browser/ui/history/history_table_view_controller.h"
 #import "ios/chrome/browser/ui/history/history_transitioning_delegate.h"
@@ -94,4 +95,11 @@
   [self stopWithCompletion:completionHandler];
 }
 
+- (void)displayPrivacySettings {
+  // TODO(crbug.com/805201): We need to push CBD into the NavigationController
+  // instead of presenting it modally.
+  [self.dispatcher showClearBrowsingDataSettingsFromViewController:
+                       self.historyNavigationController];
+}
+
 @end

ios/chrome/browser/ui/history/history_local_commands.h

@@ -12,6 +12,8 @@
 @protocol HistoryLocalCommands
 // Notifies the coordinator that history should be dismissed.
 - (void)dismissHistoryWithCompletion:(ProceduralBlock)completionHandler;
+// Notifies the coordinator that Privacy Settings should be displayed.
+- (void)displayPrivacySettings;
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_HISTORY_HISTORY_LOCAL_COMMANDS_H_

ios/chrome/browser/ui/history/history_table_view_controller.mm

@@ -15,7 +15,6 @@
 #import "ios/chrome/browser/metrics/new_tab_page_uma.h"
 #include "ios/chrome/browser/sync/sync_setup_service.h"
 #include "ios/chrome/browser/sync/sync_setup_service_factory.h"
-#import "ios/chrome/browser/ui/commands/application_commands.h"
 #import "ios/chrome/browser/ui/context_menu/context_menu_coordinator.h"
 #include "ios/chrome/browser/ui/history/history_entries_status_item.h"
 #import "ios/chrome/browser/ui/history/history_entries_status_item_delegate.h"
@@ -824,6 +823,16 @@ const int kMaxFetchCount = 100;
   [self.localDispatcher dismissHistoryWithCompletion:nil];
 }
 
+- (void)openPrivacySettings {
+  // Ignore the button tap if |self| is presenting another ViewController.
+  if ([self presentedViewController]) {
+    return;
+  }
+  base::RecordAction(
+      base::UserMetricsAction("HistoryPage_InitClearBrowsingData"));
+  [self.localDispatcher displayPrivacySettings];
+}
+
 #pragma mark Setter & Getters
 
 - (UIBarButtonItem*)cancelButton {
@@ -839,6 +848,8 @@ const int kMaxFetchCount = 100;
   return _cancelButton;
 }
 
+// TODO(crbug.com/831865): Find a way to disable the button when a VC is
+// presented.
 - (UIBarButtonItem*)clearBrowsingDataButton {
   if (!_clearBrowsingDataButton) {
     NSString* titleString = l10n_util::GetNSStringWithFixup(
@@ -846,8 +857,8 @@ const int kMaxFetchCount = 100;
     _clearBrowsingDataButton =
         [[UIBarButtonItem alloc] initWithTitle:titleString
                                          style:UIBarButtonItemStylePlain
-                                        target:nil
-                                        action:nil];
+                                        target:self
+                                        action:@selector(openPrivacySettings)];
     _clearBrowsingDataButton.tintColor = [UIColor redColor];
   }
   return _clearBrowsingDataButton;