[Media Router] Add "Hide in menu/Show in toolbar" option to Cast toolbar icon

chrome/browser/ui/toolbar/media_router_action.h

 // Copyright 2015 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 CHROME_BROWSER_UI_TOOLBAR_MEDIA_ROUTER_ACTION_H_
 #define CHROME_BROWSER_UI_TOOLBAR_MEDIA_ROUTER_ACTION_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 117 matching lines @@
   bool has_dialog_;
 
   ToolbarActionViewDelegate* delegate_;
 
   Browser* const browser_;
   ToolbarActionsBar* const toolbar_actions_bar_;
 
   // The delegate to handle platform-specific implementations.
   std::unique_ptr<MediaRouterActionPlatformDelegate> platform_delegate_;
 
-  MediaRouterContextualMenu contextual_menu_;
+  std::unique_ptr<MediaRouterContextualMenu> contextual_menu_;
 
   ScopedObserver<TabStripModel, TabStripModelObserver>
       tab_strip_model_observer_;
   ScopedObserver<ToolbarActionsBar, ToolbarActionsBarObserver>
       toolbar_actions_bar_observer_;
 
   base::WeakPtrFactory<MediaRouterAction> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterAction);
 };
 
 #endif  // CHROME_BROWSER_UI_TOOLBAR_MEDIA_ROUTER_ACTION_H_