Avoid updating compositor animations in hitTest path

Source/core/layout/compositing/DeprecatedPaintLayerCompositor.cpp

 /*
  * Copyright (C) 2009, 2010 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 232 matching lines @@
 #if ENABLE(ASSERT)
     ASSERT(lifecycle().state() == DocumentLifecycle::CompositingClean);
     assertNoUnresolvedDirtyBits();
     for (Frame* child = m_layoutView.frameView()->frame().tree().firstChild(); child; child = child->tree().nextSibling()) {
         if (child->isLocalFrame())
             toLocalFrame(child)->contentLayoutObject()->compositor()->assertNoUnresolvedDirtyBits();
     }
 #endif
 }
 
+void DeprecatedPaintLayerCompositor::updateLifecycleToCompositingClean()
+{
+    for (Frame* child = m_layoutView.frameView()->frame().tree().firstChild(); child; child = child->tree().nextSibling()) {
+        if (!child->isLocalFrame())
+            continue;
+        LocalFrame* localFrame = toLocalFrame(child);
+        if (localFrame->document()->isActive())
+            localFrame->contentLayoutObject()->compositor()->updateLifecycleToCompositingClean();
+    }
+
+    enableCompositingModeIfNeeded();
+
+    if (m_needsUpdateDescendantDependentFlags) {
+        updateDescendantDependentFlagsForEntireSubtree(*rootLayer());
+        m_needsUpdateDescendantDependentFlags = false;
+    }
+
+    m_layoutView.commitPendingSelection();
+
+    lifecycle().advanceTo(DocumentLifecycle::InCompositingUpdate);
+    updateIfNeeded();
+    lifecycle().advanceTo(DocumentLifecycle::CompositingClean);
+}
+
 void DeprecatedPaintLayerCompositor::setNeedsCompositingUpdate(CompositingUpdateType updateType)
 {
     ASSERT(updateType != CompositingUpdateNone);
     m_pendingUpdateType = std::max(m_pendingUpdateType, updateType);
     page()->animator().scheduleVisualUpdate(m_layoutView.frame());
     lifecycle().ensureStateAtMost(DocumentLifecycle::LayoutClean);
 }
 
 void DeprecatedPaintLayerCompositor::didLayout()
 {
@@ skipping 943 matching lines @@
     } else if (graphicsLayer == m_scrollLayer.get()) {
         name = "LocalFrame Scrolling Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink