cc: Merge the DrawLayer()/DrawFrame() and SwapBuffers() methods.

cc/output/delegating_renderer.h

Index: cc/output/delegating_renderer.h
diff --git a/cc/output/delegating_renderer.h b/cc/output/delegating_renderer.h
index 140906ecd4b416073c8242390b9da4261e942dc4..f2697f971f5b10f76dee6be9abc714d128455757 100644
--- a/cc/output/delegating_renderer.h
+++ b/cc/output/delegating_renderer.h
@@ -21,14 +21,12 @@ class CC_EXPORT DelegatingRenderer {
                      ResourceProvider* resource_provider);
   ~DelegatingRenderer();
 
-  void DrawFrame(RenderPassList* render_passes_in_draw_order);
-
-  void SwapBuffers(CompositorFrameMetadata metadata);
+  void DrawFrame(CompositorFrameMetadata metadata,
+                 RenderPassList render_passes_in_draw_order);
 
  private:
   OutputSurface* const output_surface_;
   ResourceProvider* const resource_provider_;
-  std::unique_ptr<DelegatedFrameData> delegated_frame_data_;
 
   DISALLOW_COPY_AND_ASSIGN(DelegatingRenderer);
 };