cc: Allow the main thread to cancel commits

cc/test/fake_picture_layer.h

 // Copyright 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 CC_TEST_FAKE_PICTURE_LAYER_H_
 #define CC_TEST_FAKE_PICTURE_LAYER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/layers/picture_layer.h"
 
 namespace cc {
 
 class FakePictureLayer : public PictureLayer {
  public:
   static scoped_refptr<FakePictureLayer> Create(ContentLayerClient* client) {
     return make_scoped_refptr(new FakePictureLayer(client));
   }
 
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
       OVERRIDE;
 
   size_t update_count() const { return update_count_; }
   void reset_update_count() { update_count_ = 0; }
 
   size_t push_properties_count() const { return push_properties_count_; }
   void reset_push_properties_count() { push_properties_count_ = 0; }
 
-  virtual bool Update(
-      ResourceUpdateQueue* queue,
-      const OcclusionTracker* occlusion) OVERRIDE;
+  void set_always_update_resources(bool always_update_resources) {
+    always_update_resources_ = always_update_resources;
+  }
+
+  virtual bool Update(ResourceUpdateQueue* queue,
+                      const OcclusionTracker* occlusion) OVERRIDE;
 
   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
 
  private:
   explicit FakePictureLayer(ContentLayerClient* client);
   virtual ~FakePictureLayer();
 
   size_t update_count_;
   size_t push_properties_count_;
+  bool always_update_resources_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_PICTURE_LAYER_H_