Remove the experimental prominent add to app launcher flow.

chrome/browser/ui/views/location_bar/location_bar_view.h

Index: chrome/browser/ui/views/location_bar/location_bar_view.h
diff --git a/chrome/browser/ui/views/location_bar/location_bar_view.h b/chrome/browser/ui/views/location_bar/location_bar_view.h
index c922f53dab7e2d00f53546824ad74650120d6ee8..9e27ce960f3e08b65962a1e7d99003ce4167bce3 100644
--- a/chrome/browser/ui/views/location_bar/location_bar_view.h
+++ b/chrome/browser/ui/views/location_bar/location_bar_view.h
@@ -29,7 +29,6 @@
 #include "ui/views/drag_controller.h"
 
 class ActionBoxButtonView;
-class AddToAppLauncherView;
 class CommandUpdater;
 class ContentSettingBubbleModelDelegate;
 class ContentSettingImageView;
@@ -487,9 +486,6 @@ class LocationBarView : public LocationBar,
   // The icon for Translate.
   TranslateIconView* translate_icon_view_;
 
-  // The view to add pages to the app launcher.
-  AddToAppLauncherView* add_to_app_launcher_view_;
-
   // The star.
   StarView* star_view_;