Add window overview mode behind --ash-enable-overview-mode flag to F5 key.

ash/wm/window_animations.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_WINDOW_ANIMATIONS_H_
 #define ASH_WM_WINDOW_ANIMATIONS_H_
 
 #include "ash/ash_export.h"
 #include "ui/gfx/transform.h"
 #include "ui/views/corewm/window_animations.h"
@@ skipping 19 matching lines @@
   WINDOW_VISIBILITY_ANIMATION_TYPE_BRIGHTNESS_GRAYSCALE
 };
 
 // Direction for ash-specific window animations used in workspaces and
 // lock/unlock animations.
 enum LayerScaleAnimationDirection {
   LAYER_SCALE_ANIMATION_ABOVE,
   LAYER_SCALE_ANIMATION_BELOW,
 };
 
+// Returns the bounds that |window| should animate to when minimizing.
+ASH_EXPORT gfx::Rect GetMinimizeRectForWindow(aura::Window* window);
+
 // Animate a cross-fade of |window| from its current bounds to |new_bounds|.
 ASH_EXPORT void CrossFadeToBounds(aura::Window* window,
                                   const gfx::Rect& new_bounds);
 
 // Cross fades |layer| (which is a clone of |window|s layer before it was
 // resized) to |window|s current bounds. |new_workspace| is the Window of the
 // workspace |window| was added to.
 // This takes ownership of |layer|.
 ASH_EXPORT void CrossFadeWindowBetweenWorkspaces(aura::Window* new_workspace,
                                                  aura::Window* window,
@@ skipping 21 matching lines @@
 
 // Returns the approximate bounds to which |window| will be animated when it
 // is minimized. The bounds are approximate because the minimize animation
 // involves rotation.
 ASH_EXPORT gfx::Rect GetMinimizeAnimationTargetBoundsInScreen(
     aura::Window* window);
 
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_ANIMATIONS_H_