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

ash/wm/overview/scoped_window_copy.h

Index: ash/wm/overview/scoped_window_copy.h
diff --git a/ash/wm/overview/scoped_window_copy.h b/ash/wm/overview/scoped_window_copy.h
deleted file mode 100644
index babc890435f95057dddf67e192f4941071075187..0000000000000000000000000000000000000000
--- a/ash/wm/overview/scoped_window_copy.h
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright 2013 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_SCOPED_WINDOW_COPY_H_
-#define ASH_WM_OVERVIEW_SCOPED_WINDOW_COPY_H_
-
-#include "base/basictypes.h"
-
-namespace aura {
-class Window;
-}
-
-namespace views {
-class Widget;
-}
-
-namespace ash {
-
-class CleanupWidgetAfterAnimationObserver;
-
-// ScopedWindowCopy copies a window and will clean up the copied layers after
-// the class goes out of scope and the last animation has finished.
-class ScopedWindowCopy {
- public:
-  ScopedWindowCopy(aura::Window* target_root, aura::Window* src_window);
-  ~ScopedWindowCopy();
-
-  aura::Window* GetWindow();
-
- private:
-  // A weak pointer to a copy of the source window owned by cleanup_observer_.
-  views::Widget* widget_;
-
-  // A weak pointer to an animation observer which owns itself. When the
-  // ScopedWindowCopy is destroyed The animation observer will clean up the
-  // widget, layer and itself once any pending animations have completed.
-  CleanupWidgetAfterAnimationObserver* cleanup_observer_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedWindowCopy);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_OVERVIEW_SCOPED_WINDOW_COPY_H_