Use an SVGElementProxy in ReferenceClipPathOperation

third_party/WebKit/Source/core/svg/SVGElementRareData.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/svg/SVGElementRareData.h"
 
 #include "core/css/CSSCursorImageValue.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/Document.h"
 #include "core/svg/SVGCursorElement.h"
+#include "core/svg/SVGElementProxy.h"
 
 namespace blink {
 
 MutableStylePropertySet*
 SVGElementRareData::ensureAnimatedSMILStyleProperties() {
   if (!m_animatedSMILStyleProperties)
     m_animatedSMILStyleProperties =
         MutableStylePropertySet::create(SVGAttributeMode);
   return m_animatedSMILStyleProperties.get();
 }
@@ skipping 14 matching lines @@
             MatchAllRulesExcludingSMIL);
     m_needsOverrideComputedStyleUpdate = false;
   }
   ASSERT(m_overrideComputedStyle);
   return m_overrideComputedStyle.get();
 }
 
 DEFINE_TRACE(SVGElementRareData) {
   visitor->trace(m_outgoingReferences);
   visitor->trace(m_incomingReferences);
+  visitor->trace(m_elementProxySet);
   visitor->trace(m_animatedSMILStyleProperties);
   visitor->trace(m_elementInstances);
   visitor->trace(m_correspondingElement);
   visitor->trace(m_owner);
   visitor->template registerWeakMembers<
       SVGElementRareData, &SVGElementRareData::processWeakMembers>(this);
 }
 
 void SVGElementRareData::processWeakMembers(Visitor* visitor) {
   ASSERT(m_owner);
@@ skipping 11 matching lines @@
   }
   ASSERT(!m_cursorElement || ThreadHeap::isHeapObjectAlive(m_cursorElement));
   ASSERT(!m_cursorImageValue ||
          ThreadHeap::isHeapObjectAlive(m_cursorImageValue));
 }
 
 AffineTransform* SVGElementRareData::animateMotionTransform() {
   return &m_animateMotionTransform;
 }
 
+SVGElementProxySet& SVGElementRareData::ensureElementProxySet() {
+  if (!m_elementProxySet)
+    m_elementProxySet = new SVGElementProxySet;
+  return *m_elementProxySet;
+}
+
 }  // namespace blink