Add DisplayScheduler for Surfaces

cc/surfaces/display.h

Index: cc/surfaces/display.h
diff --git a/cc/surfaces/display.h b/cc/surfaces/display.h
index 30db259f8f894f99978a054cd5d920119f244d8d..253acb7faa3429611b0e85a597abb4f0e9b8f496 100644
--- a/cc/surfaces/display.h
+++ b/cc/surfaces/display.h
@@ -30,6 +30,7 @@ namespace cc {
 class BlockingTaskRunner;
 class DirectRenderer;
 class DisplayClient;
+class DisplayScheduler;
 class OutputSurface;
 class RendererSettings;
 class ResourceProvider;
@@ -54,12 +55,14 @@ class CC_SURFACES_EXPORT Display : public OutputSurfaceClient,
           const RendererSettings& settings);
   ~Display() override;
 
-  bool Initialize(scoped_ptr<OutputSurface> output_surface);
+  bool Initialize(scoped_ptr<OutputSurface> output_surface,
+                  DisplayScheduler* scheduler);
 
   // device_scale_factor is used to communicate to the external window system
   // what scale this was rendered at.
   void SetSurfaceId(SurfaceId id, float device_scale_factor);
   void Resize(const gfx::Size& new_size);
+  bool CurrentSurfaceHasResources();
   bool Draw();
 
   SurfaceId CurrentSurfaceId();
@@ -101,8 +104,10 @@ class CC_SURFACES_EXPORT Display : public OutputSurfaceClient,
   RendererSettings settings_;
   SurfaceId current_surface_id_;
   gfx::Size current_surface_size_;
+  bool current_surface_has_resources_;
   float device_scale_factor_;
   scoped_ptr<OutputSurface> output_surface_;
+  DisplayScheduler* scheduler_;
   scoped_ptr<ResourceProvider> resource_provider_;
   scoped_ptr<SurfaceAggregator> aggregator_;
   scoped_ptr<DirectRenderer> renderer_;