Remove PerBrowser launcher

ash/launcher/launcher.h

 // Copyright (c) 2012 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 ASH_LAUNCHER_LAUNCHER_H_
 #define ASH_LAUNCHER_LAUNCHER_H_
 
 #include "ash/ash_export.h"
 #include "ash/launcher/launcher_types.h"
 #include "ash/shelf/shelf_types.h"
@@ skipping 83 matching lines @@
   views::View* GetAppListButtonView() const;
 
   // Launch a 0-indexed launcher item in the Launcher.
   // A negative index launches the last launcher item in the launcher.
   void LaunchAppIndexAt(int item_index);
 
   // Only to be called for testing. Retrieves the LauncherView.
   // TODO(sky): remove this!
   internal::LauncherView* GetLauncherViewForTest();
 
-  LauncherDelegate* delegate() { return delegate_; }
-
   ShelfWidget* shelf_widget() { return shelf_widget_; }
 
   // Set the bounds of the launcher view.
   void SetLauncherViewBounds(gfx::Rect bounds);
   gfx::Rect GetLauncherViewBounds() const;
 
   // Returns ApplicationDragAndDropHost for this Launcher.
   app_list::ApplicationDragAndDropHost* GetDragAndDropHostForAppList();
 
  private:
   // LauncherView used to display icons.
   internal::LauncherView* launcher_view_;
 
   ShelfAlignment alignment_;
 
   LauncherDelegate* delegate_;
 
   ShelfWidget* shelf_widget_;
 
   DISALLOW_COPY_AND_ASSIGN(Launcher);
 };
 
 }  // namespace ash
 
 #endif  // ASH_LAUNCHER_LAUNCHER_H_