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

ui/views/widget/widget.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_VIEWS_WIDGET_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
 #pragma once
 
 #include <set>
 #include <stack>
@@ skipping 81 matching lines @@
 class VIEWS_EXPORT Widget : public internal::NativeWidgetDelegate,
                             public FocusTraversable {
  public:
   // Observers can listen to various events on the Widgets.
   class VIEWS_EXPORT Observer {
    public:
     virtual void OnWidgetClosing(Widget* widget) {}
     virtual void OnWidgetVisibilityChanged(Widget* widget, bool visible) {}
     virtual void OnWidgetActivationChanged(Widget* widget, bool active) {}
     virtual void OnWidgetMoved(Widget* widget) {}
+   protected:
+    virtual ~Observer() {}
   };
 
   typedef std::set<Widget*> Widgets;
 
   enum FrameType {
     FRAME_TYPE_DEFAULT,         // Use whatever the default would be.
     FRAME_TYPE_FORCE_CUSTOM,    // Force the custom frame.
     FRAME_TYPE_FORCE_NATIVE     // Force the native frame.
   };
 
@@ skipping 527 matching lines @@
       const gfx::Rect& dirty_region) OVERRIDE;
   virtual void OnNativeWidgetPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual int GetNonClientComponent(const gfx::Point& point) OVERRIDE;
   virtual bool OnKeyEvent(const KeyEvent& event) OVERRIDE;
   virtual bool OnMouseEvent(const MouseEvent& event) OVERRIDE;
   virtual void OnMouseCaptureLost() OVERRIDE;
   virtual ui::TouchStatus OnTouchEvent(const TouchEvent& event) OVERRIDE;
   virtual ui::GestureStatus OnGestureEvent(const GestureEvent& event) OVERRIDE;
   virtual bool ExecuteCommand(int command_id) OVERRIDE;
   virtual InputMethod* GetInputMethodDirect() OVERRIDE;
+  virtual bool HasHitTestMask() const OVERRIDE;
+  virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE;
   virtual Widget* AsWidget() OVERRIDE;
   virtual const Widget* AsWidget() const OVERRIDE;
 
   // Overridden from FocusTraversable:
   virtual FocusSearch* GetFocusSearch() OVERRIDE;
   virtual FocusTraversable* GetFocusTraversableParent() OVERRIDE;
   virtual View* GetFocusTraversableParentView() OVERRIDE;
 
  protected:
   // Creates the RootView to be used within this Widget. Subclasses may override
@@ skipping 127 matching lines @@
   // duplicate move events even though the mouse hasn't moved.
   bool last_mouse_event_was_move_;
   gfx::Point last_mouse_event_position_;
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_WIDGET_H_