cc: Implement DelegatingRender::drawFrame() method.

cc/test/fake_output_surface.h

Index: cc/test/fake_output_surface.h
diff --git a/cc/test/fake_output_surface.h b/cc/test/fake_output_surface.h
index d843ccab131e7958e1189c7a703aecd536c918fa..73eb08eeb7bb0c12a30c0162c380ae4bfdcbc5c0 100644
--- a/cc/test/fake_output_surface.h
+++ b/cc/test/fake_output_surface.h
@@ -7,6 +7,7 @@
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "cc/compositor_frame.h"
 #include "cc/output_surface.h"
 #include "cc/test/fake_software_output_device.h"
 #include "cc/test/fake_web_graphics_context_3d.h"
@@ -47,7 +48,10 @@ class FakeOutputSurface : public OutputSurface {
   virtual WebKit::WebGraphicsContext3D* Context3D() const OVERRIDE;
   virtual SoftwareOutputDevice* SoftwareDevice() const OVERRIDE;
 
-  virtual void SendFrameToParentCompositor(const CompositorFrame&) OVERRIDE;
+  virtual void SendFrameToParentCompositor(CompositorFrame&) OVERRIDE;
+
+  CompositorFrame& last_sent_frame() { return last_sent_frame_; }
+  size_t num_sent_frames() { return num_sent_frames_; }
 
 private:
   explicit FakeOutputSurface(
@@ -59,6 +63,8 @@ private:
   scoped_ptr<SoftwareOutputDevice> software_device_;
   struct Capabilities capabilities_;
   OutputSurfaceClient* client_;
+  CompositorFrame last_sent_frame_;
+  size_t num_sent_frames_;
 };
 
 static inline scoped_ptr<cc::OutputSurface> createFakeOutputSurface()