Turn off the old compositing path for SPv2.

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 49 matching lines @@
 {
     return document.timeline().hasOutdatedAnimation() || document.timeline().needsAnimationTimingUpdate();
 }
 
 void DocumentAnimations::updateAnimationTimingIfNeeded(Document& document)
 {
     if (needsAnimationTimingUpdate(document))
         updateAnimationTiming(document, TimingUpdateOnDemand);
 }
 
-void DocumentAnimations::updateCompositorAnimations(Document& document)
+void DocumentAnimations::updateAnimations(Document& document)
 {
-    DCHECK_EQ(document.lifecycle().state(), DocumentLifecycle::CompositingClean);
+    if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled())
+        DCHECK(document.lifecycle().state() >= DocumentLifecycle::CompositingClean);
+    else
+        DCHECK(document.lifecycle().state() >= DocumentLifecycle::LayoutClean);
+
     if (document.compositorPendingAnimations().update()) {
         DCHECK(document.view());
         document.view()->scheduleAnimation();
     }
 
     document.timeline().scheduleNextService();
 }
 
 } // namespace blink