cc: Plumb group id through animation creation and start/finish notifications

cc/animation/layer_animation_controller_unittest.cc

Index: cc/animation/layer_animation_controller_unittest.cc
diff --git a/cc/animation/layer_animation_controller_unittest.cc b/cc/animation/layer_animation_controller_unittest.cc
index 6d2f0c0b9048f67fc3a2a719c55fac8ce361a820..6d8806fdc99e5abfe8bc93e34abce66cd9f367d0 100644
--- a/cc/animation/layer_animation_controller_unittest.cc
+++ b/cc/animation/layer_animation_controller_unittest.cc
@@ -865,15 +865,16 @@ class FakeAnimationDelegate : public AnimationDelegate {
       : started_(false),
         finished_(false) {}
 
-  virtual void NotifyAnimationStarted(
-      TimeTicks monotonic_time,
-      Animation::TargetProperty target_property) override {
+  virtual void NotifyAnimationStarted(TimeTicks monotonic_time,
+                                      Animation::TargetProperty target_property,
+                                      int group) override {
     started_ = true;
   }
 
   virtual void NotifyAnimationFinished(
       TimeTicks monotonic_time,
-      Animation::TargetProperty target_property) override {
+      Animation::TargetProperty target_property,
+      int group) override {
     finished_ = true;
   }