Make cc::animation::TrimTimeToCurrentIteration,cc::AnimationCurve::Duration use TimeTicks/TimeDelta

cc/animation/keyframed_animation_curve.h

Index: cc/animation/keyframed_animation_curve.h
diff --git a/cc/animation/keyframed_animation_curve.h b/cc/animation/keyframed_animation_curve.h
index a6e6740e560dd588c7c5cfd260a85e2af4428eef..ff746fead68381470cedc0c7bd6688db0dcbbd64 100644
--- a/cc/animation/keyframed_animation_curve.h
+++ b/cc/animation/keyframed_animation_curve.h
@@ -5,6 +5,7 @@
 #ifndef CC_ANIMATION_KEYFRAMED_ANIMATION_CURVE_H_
 #define CC_ANIMATION_KEYFRAMED_ANIMATION_CURVE_H_
 
+#include "base/time/time.h"
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/timing_function.h"
 #include "cc/animation/transform_operations.h"
@@ -126,7 +127,7 @@ class CC_EXPORT KeyframedColorAnimationCurve : public ColorAnimationCurve {
   }
 
   // AnimationCurve implementation
-  double Duration() const override;
+  base::TimeDelta Duration() const override;
   scoped_ptr<AnimationCurve> Clone() const override;
 
   // BackgrounColorAnimationCurve implementation
@@ -156,7 +157,7 @@ class CC_EXPORT KeyframedFloatAnimationCurve : public FloatAnimationCurve {
   }
 
   // AnimationCurve implementation
-  double Duration() const override;
+  base::TimeDelta Duration() const override;
   scoped_ptr<AnimationCurve> Clone() const override;
 
   // FloatAnimationCurve implementation
@@ -187,7 +188,7 @@ class CC_EXPORT KeyframedTransformAnimationCurve
   }
 
   // AnimationCurve implementation
-  double Duration() const override;
+  base::TimeDelta Duration() const override;
   scoped_ptr<AnimationCurve> Clone() const override;
 
   // TransformAnimationCurve implementation
@@ -224,7 +225,7 @@ class CC_EXPORT KeyframedFilterAnimationCurve
   }
 
   // AnimationCurve implementation
-  double Duration() const override;
+  base::TimeDelta Duration() const override;
   scoped_ptr<AnimationCurve> Clone() const override;
 
   // FilterAnimationCurve implementation