Update from https://crrev.com/304121

cc/test/animation_test_common.h

Index: cc/test/animation_test_common.h
diff --git a/cc/test/animation_test_common.h b/cc/test/animation_test_common.h
index 328ae840f2270c30dcb067241398a4eec8fb4566..a69f0c95f6e1df537bb82b2e0cd7a5d550ee7b1a 100644
--- a/cc/test/animation_test_common.h
+++ b/cc/test/animation_test_common.h
@@ -26,12 +26,12 @@ class FakeFloatAnimationCurve : public FloatAnimationCurve {
   explicit FakeFloatAnimationCurve(double duration);
   ~FakeFloatAnimationCurve() override;
 
-  double Duration() const override;
+  base::TimeDelta Duration() const override;
   float GetValue(double now) const override;
   scoped_ptr<AnimationCurve> Clone() const override;
 
  private:
-  double duration_;
+  base::TimeDelta duration_;
 };
 
 class FakeTransformTransition : public TransformAnimationCurve {
@@ -39,7 +39,7 @@ class FakeTransformTransition : public TransformAnimationCurve {
   explicit FakeTransformTransition(double duration);
   ~FakeTransformTransition() override;
 
-  double Duration() const override;
+  base::TimeDelta Duration() const override;
   gfx::Transform GetValue(double time) const override;
   bool AnimatedBoundsForBox(const gfx::BoxF& box,
                             gfx::BoxF* bounds) const override;
@@ -51,7 +51,7 @@ class FakeTransformTransition : public TransformAnimationCurve {
   scoped_ptr<AnimationCurve> Clone() const override;
 
  private:
-  double duration_;
+  base::TimeDelta duration_;
 };
 
 class FakeFloatTransition : public FloatAnimationCurve {
@@ -59,13 +59,13 @@ class FakeFloatTransition : public FloatAnimationCurve {
   FakeFloatTransition(double duration, float from, float to);
   ~FakeFloatTransition() override;
 
-  double Duration() const override;
+  base::TimeDelta Duration() const override;
   float GetValue(double time) const override;
 
   scoped_ptr<AnimationCurve> Clone() const override;
 
  private:
-  double duration_;
+  base::TimeDelta duration_;
   float from_;
   float to_;
 };