[animations] Adds metrics for jank on selected layer animations

ui/compositor/test/test_layer_animation_delegate.cc

Index: ui/compositor/test/test_layer_animation_delegate.cc
diff --git a/ui/compositor/test/test_layer_animation_delegate.cc b/ui/compositor/test/test_layer_animation_delegate.cc
index 350370d455d9066ebde58bb085446bfa33bed45f..ee6f42659ab1566e4e861d9c8409e54b08c3cddd 100644
--- a/ui/compositor/test/test_layer_animation_delegate.cc
+++ b/ui/compositor/test/test_layer_animation_delegate.cc
@@ -115,6 +115,15 @@ TestLayerAnimationDelegate::GetThreadedAnimationDelegate() {
   return &threaded_delegate_;
 }
 
+int TestLayerAnimationDelegate::GetFrameNumber() const {
+  return 0;
+}
+
+float TestLayerAnimationDelegate::GetRefreshRate() const {
+  return 60.0;
+}
+
+
 void TestLayerAnimationDelegate::CreateCcLayer() {
   cc_layer_ = cc::Layer::Create();
 }