[ios] Manage adaptive primary toolbar's fakebox tap

Bug: 803372
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Icdfc2ee6450ab03cf357792cc3ad6d0060baf58e
Reviewed-on: https://chromium-review.googlesource.com/891518
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533303}

ios/chrome/browser/ui/toolbar/adaptive/adaptive_toolbar_view_controller.mm

@@ -41,7 +41,6 @@
 
 - (void)updateForSideSwipeSnapshotOnNTP:(BOOL)onNTP {
   self.view.progressBar.hidden = YES;
-  // TODO(crbug.com/804848): Have the correct appearance on NTP.
   // TODO(crbug.com/804850): Have the correct background color for incognito
   // NTP.
 }

ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_coordinator.mm

@@ -109,15 +109,27 @@
 #pragma mark - FakeboxFocuser
 
 - (void)focusFakebox {
-  // TODO(crbug.com/803372): Implement that.
+  if (IsIPadIdiom()) {
+    // On iPhone there is no visible omnibox, so there's no need to indicate
+    // interaction was initiated from the fakebox.
+    [self.locationBarCoordinator focusOmniboxFromFakebox];
+  }
+
+  [self.locationBarCoordinator focusOmnibox];
 }
 
 - (void)onFakeboxBlur {
-  // TODO(crbug.com/803372): Implement that.
+  DCHECK(!IsIPadIdiom());
+  // Hide the toolbar if the NTP is currently displayed.
+  web::WebState* webState = self.webStateList->GetActiveWebState();
+  if (webState && IsVisibleUrlNewTabPage(webState)) {
+    self.viewController.view.hidden = YES;
+  }
 }
 
 - (void)onFakeboxAnimationComplete {
-  // TODO(crbug.com/803372): Implement that.
+  DCHECK(!IsIPadIdiom());
+  self.viewController.view.hidden = NO;
 }
 
 // TODO(crbug.com/786940): This protocol should move to the ViewController

ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_view_controller.mm

@@ -52,11 +52,15 @@
   if (!onNTP)
     return;
 
+  self.view.backgroundColor =
+      self.buttonFactory.toolbarConfiguration.NTPBackgroundColor;
   self.view.locationBarContainer.hidden = YES;
 }
 
 - (void)resetAfterSideSwipeSnapshot {
   [super resetAfterSideSwipeSnapshot];
+  self.view.backgroundColor =
+      self.buttonFactory.toolbarConfiguration.backgroundColor;
   self.view.locationBarContainer.hidden = NO;
 }