Enqueuing new frames in a Surface should cause Displays to reaggregate it

cc/surfaces/surface_manager.cc

 // Copyright 2014 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.
 
 #include "cc/surfaces/surface_manager.h"
 
 #include "base/logging.h"
 #include "cc/surfaces/surface.h"
 
 namespace cc {
@@ skipping 17 matching lines @@
   surface_map_.erase(it);
 }
 
 Surface* SurfaceManager::GetSurfaceForId(SurfaceId surface_id) {
   SurfaceMap::iterator it = surface_map_.find(surface_id);
   if (it == surface_map_.end())
     return NULL;
   return it->second;
 }
 
+void SurfaceManager::SurfaceModified(SurfaceId surface_id) {
+  FOR_EACH_OBSERVER(
+      SurfaceDamageObserver, observer_list_, OnSurfaceDamaged(surface_id));
+}
+
 }  // namespace cc