Make the web-animations engine use the passed in blink::WebFrameTime values.

Source/core/animation/AnimationStackTest.cpp

Index: Source/core/animation/AnimationStackTest.cpp
diff --git a/Source/core/animation/AnimationStackTest.cpp b/Source/core/animation/AnimationStackTest.cpp
index 9f62e7354de3ef381f993a74dd7f6ce8fb20e25d..e57a6580664ddbafc86455d05a780adcddc00491 100644
--- a/Source/core/animation/AnimationStackTest.cpp
+++ b/Source/core/animation/AnimationStackTest.cpp
@@ -20,7 +20,8 @@ protected:
     virtual void SetUp()
     {
         document = Document::create();
-        document->animationClock().resetTimeForTesting();
+        document->animationClock().clearTimeForTesting();
+        document->animationClock().updateTime(blink::WebFrameTime(-1, -1, 0, 0));
         timeline = AnimationTimeline::create(document.get());
         element = document->createElement("foo", ASSERT_NO_EXCEPTION);
     }
@@ -35,7 +36,7 @@ protected:
 
     void updateTimeline(double time)
     {
-        document->animationClock().updateTime(time);
+        document->animationClock().updateTime(blink::WebFrameTime(-1, -1, time, time + 1));
         timeline->serviceAnimations(TimingUpdateForAnimationFrame);
     }