Revert "Make compositingState explicit (re-land #2 with bogus ASSERT removed)"

Source/core/frame/animation/ImplicitAnimation.cpp

 /*
  * Copyright (C) 2007 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 86 matching lines @@
 void ImplicitAnimation::getAnimatedStyle(RefPtr<RenderStyle>& animatedStyle)
 {
     if (!animatedStyle)
         animatedStyle = RenderStyle::clone(m_toStyle.get());
 
     CSSPropertyAnimation::blendProperties(this, m_animatingProperty, animatedStyle.get(), m_fromStyle.get(), m_toStyle.get(), progress(1, 0, 0));
 }
 
 void ImplicitAnimation::startAnimation(double timeOffset)
 {
-    if (m_object && m_object->compositingState() == PaintsIntoOwnBacking)
+    if (m_object && m_object->isComposited())
         m_isAccelerated = toRenderBoxModelObject(m_object)->startTransition(timeOffset, m_animatingProperty, m_fromStyle.get(), m_toStyle.get());
 }
 
 void ImplicitAnimation::pauseAnimation(double timeOffset)
 {
     if (!m_object)
         return;
 
-    if (m_object && m_object->compositingState() == PaintsIntoOwnBacking && isAccelerated())
+    if (m_object && m_object->isComposited() && isAccelerated())
         toRenderBoxModelObject(m_object)->transitionPaused(timeOffset, m_animatingProperty);
 
     // Restore the original (unanimated) style
     if (!paused())
         setNeedsStyleRecalc(m_object->node());
 }
 
 void ImplicitAnimation::endAnimation()
 {
-    if (m_object && m_object->compositingState() == PaintsIntoOwnBacking && isAccelerated())
+    if (m_object && m_object->isComposited() && isAccelerated())
         toRenderBoxModelObject(m_object)->transitionFinished(m_animatingProperty);
     m_isAccelerated = false;
 }
 
 void ImplicitAnimation::onAnimationEnd(double elapsedTime)
 {
     // If we have a keyframe animation on this property, this transition is being overridden. The keyframe
     // animation keeps an unanimated style in case a transition starts while the keyframe animation is
     // running. But now that the transition has completed, we need to update this style with its new
     // destination. If we didn't, the next time through we would think a transition had started
@@ skipping 144 matching lines @@
     // only need service at the end of the transition.
     if (CSSPropertyAnimation::animationOfPropertyIsAccelerated(m_animatingProperty) && isAccelerated()) {
         bool isLooping;
         getTimeToNextEvent(t, isLooping);
     }
 
     return t;
 }
 
 } // namespace WebCore