compositor-worker: Force elements to grow a layer when a CompositorProxy is created.

Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1623 matching lines @@
     if (ElementAnimations* elementAnimations = this->elementAnimations()) {
         elementAnimations->cssAnimations().maybeApplyPendingUpdate(this);
         elementAnimations->updateAnimationFlags(*style);
     }
 
     if (style->hasTransform()) {
         if (const StylePropertySet* inlineStyle = this->inlineStyle())
             style->setHasInlineTransform(inlineStyle->hasProperty(CSSPropertyTransform) || inlineStyle->hasProperty(CSSPropertyWebkitTransform));
     }
 
+    if (hasCompositorProxy())
+        style->setHasCompositorProxy(true);
+
     document().didRecalculateStyleForElement();
     return style.release();
 }
 
 PassRefPtr<ComputedStyle> Element::originalStyleForLayoutObject()
 {
     ASSERT(document().inStyleRecalc());
     return document().ensureStyleResolver().styleForElement(this);
 }
 
@@ skipping 1841 matching lines @@
 {
 #if ENABLE(OILPAN)
     if (hasRareData())
         visitor->trace(elementRareData());
     visitor->trace(m_elementData);
 #endif
     ContainerNode::trace(visitor);
 }
 
 } // namespace blink