add compact layout manager window transition unittest.

ash/wm/compact_layout_manager.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 ASH_WM_COMPACT_LAYOUT_MANAGER_H_
 #define ASH_WM_COMPACT_LAYOUT_MANAGER_H_
 #pragma once
 
 #include "ash/ash_export.h"
 #include "ash/wm/base_layout_manager.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/gtest_prod_util.h"
 #include "ui/gfx/compositor/layer_animation_observer.h"
 
 namespace views {
 class Widget;
 }
 
 namespace ash {
 namespace internal {
 
 // CompactLayoutManager is the LayoutManager used in compact window mode,
@@ skipping 26 matching lines @@
 
   // ui::LayerAnimationObserver:
   virtual void OnLayerAnimationEnded(
       const ui::LayerAnimationSequence* animation) OVERRIDE;
   virtual void OnLayerAnimationScheduled(
       const ui::LayerAnimationSequence* animation) OVERRIDE;
   virtual void OnLayerAnimationAborted(
       const ui::LayerAnimationSequence* animation) OVERRIDE;
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(CompactLayoutManagerTransitionTest,
+                           TransitionTest);
+
   // Hides the status area if we are managing it and full screen windows are
   // visible.
   void UpdateStatusAreaVisibility();
 
   // Start a slide in / out animation sequence for the layer.
   // The underlying layer is translated to -|offset_x| position.
   void AnimateSlideTo(int offset_x);
 
   // Layout all browser windows currently in the window cycle list.
   // skip |skip_this_window| if we do not want the window to be laid out.
@@ skipping 14 matching lines @@
   // The browser window currently in the viewport.
   aura::Window* current_window_;
 
   DISALLOW_COPY_AND_ASSIGN(CompactLayoutManager);
 };
 
 }  // namespace ash
 }  // namespace internal
 
 #endif  // ASH_WM_COMPACT_LAYOUT_MANAGER_H_