app_list: Fix shadow bleeds over launcher button and steals mouse events

ui/app_list/app_list_view.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 UI_APP_LIST_APP_LIST_VIEW_H_
 #define UI_APP_LIST_APP_LIST_VIEW_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/app_list/app_list_export.h"
@@ skipping 33 matching lines @@
   void Close();
 
   void UpdateBounds();
 
  private:
   // Creates models to use.
   void CreateModel();
 
   // Overridden from views::WidgetDelegateView:
   virtual views::View* GetInitiallyFocusedView() OVERRIDE;
+  virtual bool HasHitTestMask() const OVERRIDE;
+  virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE;
 
   // Overridden from views::View:
   virtual bool OnKeyPressed(const views::KeyEvent& event) OVERRIDE;
 
   // Overridden from views::ButtonListener:
   virtual void ButtonPressed(views::Button* sender,
                              const views::Event& event) OVERRIDE;
 
   // Overridden from views::BubbleDelegate:
   virtual gfx::Rect GetBubbleBounds() OVERRIDE;
@@ skipping 14 matching lines @@
   AppListBubbleBorder* bubble_border_;  // Owned by views hierarchy.
   SearchBoxView* search_box_view_;  // Owned by views hierarchy.
   ContentsView* contents_view_;  // Owned by views hierarchy.
 
   DISALLOW_COPY_AND_ASSIGN(AppListView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_VIEW_H_