ash: Improved window maximize/restore animations

ash/wm/window_animations.h

Index: ash/wm/window_animations.h
diff --git a/ash/wm/window_animations.h b/ash/wm/window_animations.h
index 3c9a242121a814f479e07da6d7dceda9b50d98df..3bcf8beb84515177b43c9bff92c4ebfcbeb933b5 100644
--- a/ash/wm/window_animations.h
+++ b/ash/wm/window_animations.h
@@ -7,12 +7,16 @@
 #pragma once
 
 #include "ash/ash_export.h"
-#include "base/time.h"
 
 namespace aura {
 class Window;
 }
-
+namespace base {
+class TimeDelta;
+}
+namespace gfx {
+class Rect;
+}
 namespace ui {
 class ImplicitAnimationObserver;
 }
@@ -68,6 +72,10 @@ ASH_EXPORT ui::ImplicitAnimationObserver* CreateHidingWindowAnimationObserver(
 
 namespace internal {
 
+// 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);
+
 // Returns false if the |window| didn't animate.
 ASH_EXPORT bool AnimateOnChildWindowVisibilityChanged(
     aura::Window* window, bool visible);