Change overview mode to so that docked panel windows are not grouped together.

ash/wm/overview/transparent_activate_window_button.h

 // Copyright 2014 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_WM_OVERVIEW_TRANSPARENT_ACTIVATE_WINDOW_BUTTON_H_
 #define ASH_WM_OVERVIEW_TRANSPARENT_ACTIVATE_WINDOW_BUTTON_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
@@ skipping 24 matching lines @@
   // Sets the accessibility name.
   void SetAccessibleName(const base::string16& name);
 
   // Sets the bounds of the transparent window.
   void SetBounds(const gfx::Rect& bounds);
 
   // Sends an accessibility focus alert so that if chromevox is enabled, the
   // window title is read.
   void SendFocusAlert() const;
 
-  // Stacks |this| above |activate_button| in the window z-ordering.
-  void StackAbove(TransparentActivateWindowButton* activate_button);
-
  private:
   // The transparent window event handler widget itself.
   scoped_ptr<views::Widget> event_handler_widget_;
 
   // The transparent button view that handles user input. Not owned.
   views::Button* transparent_button_;
 
   DISALLOW_COPY_AND_ASSIGN(TransparentActivateWindowButton);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_OVERVIEW_TRANSPARENT_ACTIVATE_WINDOW_BUTTON_H_