cc: Handle retroactive BeginFrames in the Scheduler.

cc/test/layer_tree_test.h

Index: cc/test/layer_tree_test.h
diff --git a/cc/test/layer_tree_test.h b/cc/test/layer_tree_test.h
index b017d0ff6d43b0ff5a2c0cc5b42e323bdaca3574..97170a08444c2deeaf5cd3b556cf8f934279d140 100644
--- a/cc/test/layer_tree_test.h
+++ b/cc/test/layer_tree_test.h
@@ -34,10 +34,10 @@ class TestHooks : public AnimationDelegate {
 
   void ReadSettings(const LayerTreeSettings& settings);
 
-  virtual void WillBeginImplFrameOnThread(LayerTreeHostImpl* host_impl,
-                                          const BeginFrameArgs& args) {}
-  virtual void DidBeginImplFrameOnThread(LayerTreeHostImpl* host_impl,
-                                         const BeginFrameArgs& args) {}
+  virtual void WillBeginFrameOnThread(LayerTreeHostImpl* host_impl,
+                                      const BeginFrameArgs& args) {}
+  virtual void DidBeginFrameOnThread(LayerTreeHostImpl* host_impl,
+                                     const BeginFrameArgs& args) {}
   virtual void BeginMainFrameAbortedOnThread(LayerTreeHostImpl* host_impl,
                                              bool did_handle) {}
   virtual void BeginCommitOnThread(LayerTreeHostImpl* host_impl) {}