Provide a vsync notification to the renderer

cc/test/fake_output_surface.cc

Index: cc/test/fake_output_surface.cc
diff --git a/cc/test/fake_output_surface.cc b/cc/test/fake_output_surface.cc
index ebbe7832b167284c658db7e168433797148d81ba..4c6968cb32290f6ecb497e56550fe2cc6f546176 100644
--- a/cc/test/fake_output_surface.cc
+++ b/cc/test/fake_output_surface.cc
@@ -4,11 +4,14 @@
 
 #include "cc/test/fake_output_surface.h"
 
+#include "cc/output_surface_client.h"
+
 namespace cc {
 
 FakeOutputSurface::FakeOutputSurface(
     scoped_ptr<WebKit::WebGraphicsContext3D> context3d, bool has_parent)
-    : num_sent_frames_(0) {
+    : num_sent_frames_(0)
+    , vsync_notification_enabled_(false) {
   context3d_ = context3d.Pass();
   capabilities_.has_parent_compositor = has_parent;
 }
@@ -51,4 +54,12 @@ void FakeOutputSurface::SendFrameToParentCompositor(
   ++num_sent_frames_;
 }
 
+void FakeOutputSurface::EnableVSyncNotification(bool enable) {
+  vsync_notification_enabled_ = enable;
+}
+
+void FakeOutputSurface::DidVSync(base::TimeTicks frame_time) {
+  client_->DidVSync(frame_time);
+}
+
 }  // namespace cc