Move animation update to follow paint phase for SPv2.

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

Index: third_party/WebKit/Source/core/animation/DocumentAnimations.cpp
diff --git a/third_party/WebKit/Source/core/animation/DocumentAnimations.cpp b/third_party/WebKit/Source/core/animation/DocumentAnimations.cpp
index e7c249939038b681357b67e28aaa43b825104ae6..806b319ef9dfe6410d657e6e6051e18c27d0295e 100644
--- a/third_party/WebKit/Source/core/animation/DocumentAnimations.cpp
+++ b/third_party/WebKit/Source/core/animation/DocumentAnimations.cpp
@@ -65,11 +65,10 @@ void DocumentAnimations::updateAnimationTimingIfNeeded(Document& document) {
     updateAnimationTiming(document, TimingUpdateOnDemand);
 }
 
-void DocumentAnimations::updateAnimations(Document& document) {
-  if (!RuntimeEnabledFeatures::slimmingPaintV2Enabled())
-    DCHECK(document.lifecycle().state() >= DocumentLifecycle::CompositingClean);
-  else
-    DCHECK(document.lifecycle().state() >= DocumentLifecycle::LayoutClean);
+void DocumentAnimations::updateAnimations(
+    Document& document,
+    DocumentLifecycle::LifecycleState requiredLifecycleState) {
+  DCHECK(document.lifecycle().state() >= requiredLifecycleState);
 
   if (document.compositorPendingAnimations().update()) {
     DCHECK(document.view());