[animations] Adds metrics for jank on selected layer animations

ui/compositor/layer.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_COMPOSITOR_LAYER_H_
 #define UI_COMPOSITOR_LAYER_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 403 matching lines @@
   gfx::Transform GetTransformForAnimation() const override;
   float GetOpacityForAnimation() const override;
   bool GetVisibilityForAnimation() const override;
   float GetBrightnessForAnimation() const override;
   float GetGrayscaleForAnimation() const override;
   SkColor GetColorForAnimation() const override;
   float GetDeviceScaleFactor() const override;
   cc::Layer* GetCcLayer() const override;
   LayerThreadedAnimationDelegate* GetThreadedAnimationDelegate() override;
   LayerAnimatorCollection* GetLayerAnimatorCollection() override;
+  int GetFrameNumber() override;
 
   // Creates a corresponding composited layer for |type_|.
   void CreateCcLayer();
 
   // Recomputes and sets to |cc_layer_|.
   void RecomputeDrawsContentAndUVRect();
   void RecomputePosition();
 
   // Set all filters which got applied to the layer.
   void SetLayerFilters();
@@ skipping 103 matching lines @@
   // The size of the frame or texture in DIP, set when SetShowDelegatedContent
   // or SetTextureMailbox was called.
   gfx::Size frame_size_in_dip_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_H_