Added ability to dynamically toggle frame throttling in the scheduler.

cc/test/fake_proxy.h

Index: cc/test/fake_proxy.h
diff --git a/cc/test/fake_proxy.h b/cc/test/fake_proxy.h
index 5404cb0e50c8940fc1f82ca90cfa243f799ad4ea..e77d4f9deab96425e0625d37bcf642845254eccb 100644
--- a/cc/test/fake_proxy.h
+++ b/cc/test/fake_proxy.h
@@ -26,6 +26,7 @@ class FakeProxy : public Proxy {
   void SetOutputSurface(scoped_ptr<OutputSurface>) override {}
   void SetLayerTreeHostClientReady() override {}
   void SetVisible(bool visible) override {}
+  void SetThrottleFrameProduction(bool throttle) override {}
   const RendererCapabilities& GetRendererCapabilities() const override;
   void SetNeedsAnimate() override {}
   void SetNeedsUpdateLayers() override {}