Animation start scale should be considered for the raster scale

cc/test/animation_test_common.h

 // Copyright 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 CC_TEST_ANIMATION_TEST_COMMON_H_
 #define CC_TEST_ANIMATION_TEST_COMMON_H_
 
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/layer_animation_controller.h"
@@ skipping 28 matching lines @@
   explicit FakeTransformTransition(double duration);
   ~FakeTransformTransition() override;
 
   base::TimeDelta Duration() const override;
   gfx::Transform GetValue(base::TimeDelta time) const override;
   bool AnimatedBoundsForBox(const gfx::BoxF& box,
                             gfx::BoxF* bounds) const override;
   bool AffectsScale() const override;
   bool IsTranslation() const override;
   bool PreservesAxisAlignment() const override;
+  bool AnimationStartScale(bool forward_direction,
+                           float* start_scale) const override;
   bool MaximumTargetScale(bool forward_direction,
                           float* max_scale) const override;
 
   scoped_ptr<AnimationCurve> Clone() const override;
 
  private:
   base::TimeDelta duration_;
 };
 
 class FakeFloatTransition : public FloatAnimationCurve {
@@ skipping 114 matching lines @@
                              float end_brightness);
 
 int AddAnimatedFilterToLayer(LayerImpl* layer,
                              double duration,
                              float start_brightness,
                              float end_brightness);
 
 }  // namespace cc
 
 #endif  // CC_TEST_ANIMATION_TEST_COMMON_H_