cc: Control activation from 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 3191e5b7ab21a8064e7f868f39a87b66ad1a4796..2033a68b07acdce1cc97cf2a58510b6c72b1ded5 100644
--- a/cc/test/layer_tree_test.h
+++ b/cc/test/layer_tree_test.h
@@ -31,6 +31,8 @@ class TestHooks : public AnimationDelegate {
 
   void ReadSettings(const LayerTreeSettings& settings);
 
+  virtual void WillBeginFrameOnThread(LayerTreeHostImpl* host_impl,
+                                      const BeginFrameArgs& args) {}
   virtual void BeginCommitOnThread(LayerTreeHostImpl* host_impl) {}
   virtual void CommitCompleteOnThread(LayerTreeHostImpl* host_impl) {}
   virtual void WillActivateTreeOnThread(LayerTreeHostImpl* host_impl) {}
@@ -64,8 +66,6 @@ class TestHooks : public AnimationDelegate {
   virtual void DidCompleteSwapBuffers() {}
   virtual void ScheduleComposite() {}
   virtual void DidDeferCommit() {}
-  virtual bool CanActivatePendingTree(LayerTreeHostImpl* host_impl);
-  virtual bool CanActivatePendingTreeIfNeeded(LayerTreeHostImpl* host_impl);
   virtual void DidSetVisibleOnImplTree(LayerTreeHostImpl* host_impl,
                                        bool visible) {}