ash: Improved window maximize/restore animations

ash/wm/base_layout_manager.h

Index: ash/wm/base_layout_manager.h
diff --git a/ash/wm/base_layout_manager.h b/ash/wm/base_layout_manager.h
index 4965777c65655a362c2456b34b595acaa28507f1..becf24ab9fc8e6cebe6545b1717905d75020125f 100644
--- a/ash/wm/base_layout_manager.h
+++ b/ash/wm/base_layout_manager.h
@@ -72,7 +72,12 @@ class ASH_EXPORT BaseLayoutManager : public aura::LayoutManager,
 
  private:
   // Update window bounds based on a change in show state.
-  void UpdateBoundsFromShowState(aura::Window* window);
+  void UpdateBoundsFromShowState(aura::Window* window, bool animate);
+
+  // Updates window bounds and animates when requested and possible.
+  void MaybeAnimateToBounds(aura::Window* window,
+                            bool animate,
+                            const gfx::Rect& new_bounds);
 
   // Adjusts the window sizes when the screen changes its size or its
   // work area insets.