Revert of Web Animations: Use a single animation clock

third_party/WebKit/Source/core/animation/DocumentAnimations.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 34 matching lines @@
 
 namespace {
 
 void updateAnimationTiming(Document& document, TimingUpdateReason reason)
 {
     document.timeline().serviceAnimations(reason);
 }
 
 } // namespace
 
-void DocumentAnimations::updateAnimationTimingForAnimationFrame(Document& document)
+void DocumentAnimations::updateAnimationTimingForAnimationFrame(Document& document, double monotonicAnimationStartTime)
 {
+    document.animationClock().updateTime(monotonicAnimationStartTime);
     updateAnimationTiming(document, TimingUpdateForAnimationFrame);
 }
 
 bool DocumentAnimations::needsAnimationTimingUpdate(const Document& document)
 {
     return document.timeline().hasOutdatedAnimation() || document.timeline().needsAnimationTimingUpdate();
 }
 
 void DocumentAnimations::updateAnimationTimingIfNeeded(Document& document)
 {
     if (needsAnimationTimingUpdate(document))
         updateAnimationTiming(document, TimingUpdateOnDemand);
 }
 
 void DocumentAnimations::updateCompositorAnimations(Document& document)
 {
     ASSERT(document.lifecycle().state() == DocumentLifecycle::CompositingClean);
     if (document.compositorPendingAnimations().update()) {
         ASSERT(document.view());
         document.view()->scheduleAnimation();
     }
 
     document.timeline().scheduleNextService();
 }
 
 } // namespace blink