SetNeedsRedraw directly when updating a visible tile.

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 DelayedRasterTrigger;
 
 class FakePictureLayer : public PictureLayer {
  public:
   static scoped_refptr<FakePictureLayer> Create(ContentLayerClient* client) {
     return make_scoped_refptr(new FakePictureLayer(client));
   }
 
   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; }
 
   void set_always_update_resources(bool always_update_resources) {
     always_update_resources_ = always_update_resources;
   }
 
   bool Update(ResourceUpdateQueue* queue,
               const OcclusionTracker<Layer>* occlusion) override;
 
   void PushPropertiesTo(LayerImpl* layer) override;
 
   void OnOutputSurfaceCreated() override;
   size_t output_surface_created_count() const {
     return output_surface_created_count_;
   }
 
+  void SetUseDelayedRaster(DelayedRasterTrigger* trigger) {
+    delayed_raster_trigger_ = trigger;
+  }
+
+ protected:
+  scoped_refptr<PicturePileImpl> CreatePicturePileImpl() override;
+
  private:
   explicit FakePictureLayer(ContentLayerClient* client);
   ~FakePictureLayer() override;
 
   size_t update_count_;
   size_t push_properties_count_;
+  size_t output_surface_created_count_;
   bool always_update_resources_;
-  size_t output_surface_created_count_;
+  DelayedRasterTrigger* delayed_raster_trigger_;

[reveman, 2014/11/10 23:43:02]

Could this simply be a "base::WaitableEvent*
picture_pile_playback_is_allowed_to_complete_"? Or is the idea that
DelayedRasterTrigger would be able to do more like synthetic delays?

 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_PICTURE_LAYER_H_