Revert of Use element id's for animations

third_party/WebKit/Source/core/animation/KeyframeEffect.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 336 matching lines @@
 void KeyframeEffect::pauseAnimationForTestingOnCompositor(double pauseTime)
 {
     ASSERT(hasActiveAnimationsOnCompositor());
     if (!m_target || !m_target->layoutObject())
         return;
     ASSERT(animation());
     for (const auto& compositorAnimationId : m_compositorAnimationIds)
         CompositorAnimations::pauseAnimationForTestingOnCompositor(*m_target, *animation(), compositorAnimationId, pauseTime);
 }
 
+bool KeyframeEffect::canAttachCompositedLayers() const
+{
+    if (!m_target || !animation())
+        return false;
+
+    return CompositorAnimations::canAttachCompositedLayers(*m_target, *animation());
+}
+
 void KeyframeEffect::attachCompositedLayers()
 {
     ASSERT(m_target);
     ASSERT(animation());
     CompositorAnimations::attachCompositedLayers(*m_target, *animation());
 }
 
 DEFINE_TRACE(KeyframeEffect)
 {
     visitor->trace(m_target);
     visitor->trace(m_model);
     visitor->trace(m_sampledEffect);
     AnimationEffect::trace(visitor);
 }
 
 } // namespace blink