Stop painting when receiving delegated frame

ui/aura/window_observer.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 UI_AURA_WINDOW_OBSERVER_H_
 #define UI_AURA_WINDOW_OBSERVER_H_
 
 #include "base/basictypes.h"
 #include "base/strings/string16.h"
 #include "ui/aura/aura_export.h"
@@ skipping 68 matching lines @@
                                      const gfx::Rect& new_bounds) {}
 
   // Invoked when SetTransform() is invoked on |window|.
   virtual void OnWindowTransforming(Window* window) {}
   virtual void OnWindowTransformed(Window* window) {}
 
   // Invoked when |window|'s position among its siblings in the stacking order
   // has changed.
   virtual void OnWindowStackingChanged(Window* window) {}
 
-  // Invoked when a region of |window| is scheduled to be redrawn.
-  virtual void OnWindowPaintScheduled(Window* window,
-                                      const gfx::Rect& region) {}
+  // Invoked when a region of |window| has damage from a new delegated frame.
+  virtual void OnDelegatedFrameDamage(Window* window,
+                                      const gfx::Rect& damage_rect_in_dip) {}
 
   // Invoked when the Window is being destroyed (i.e. from the start of its
   // destructor). This is called before the window is removed from its parent.
   virtual void OnWindowDestroying(Window* window) {}
 
   // Invoked when the Window has been destroyed (i.e. at the end of
   // its destructor). This is called after the window is removed from
   // its parent.  Window automatically removes its WindowObservers
   // before calling this method, so the following code is no op.
   //
@@ skipping 29 matching lines @@
   // Tracks the number of windows being observed to track down
   // http://crbug.com/365364.
   int observing_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowObserver);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_OBSERVER_H_