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

cc/blink/web_to_cc_animation_delegate_adapter.h

Index: cc/blink/web_to_cc_animation_delegate_adapter.h
diff --git a/cc/blink/web_to_cc_animation_delegate_adapter.h b/cc/blink/web_to_cc_animation_delegate_adapter.h
index c7e7c561e50a16253302e1d6d72eb08359afbf7a..b52a7589bc0788d13e9f5be161230e7cae93e780 100644
--- a/cc/blink/web_to_cc_animation_delegate_adapter.h
+++ b/cc/blink/web_to_cc_animation_delegate_adapter.h
@@ -23,10 +23,12 @@ class WebToCCAnimationDelegateAdapter : public cc::AnimationDelegate {
  private:
   virtual void NotifyAnimationStarted(
       base::TimeTicks monotonic_time,
-      cc::Animation::TargetProperty target_property) override;
+      cc::Animation::TargetProperty target_property,
+      int group) override;
   virtual void NotifyAnimationFinished(
       base::TimeTicks monotonic_time,
-      cc::Animation::TargetProperty target_property) override;
+      cc::Animation::TargetProperty target_property,
+      int group) override;
 
   blink::WebCompositorAnimationDelegate* delegate_;