[wrapper-tracing] MutationObserver: Add write barriers

third_party/WebKit/Source/core/dom/Node.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  *
@@ skipping 11 matching lines @@
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "core/dom/Node.h"
 
 #include "bindings/core/v8/DOMDataStore.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/Microtask.h"
+#include "bindings/core/v8/ScriptWrappableVisitor.h"
 #include "bindings/core/v8/V8DOMWrapper.h"
 #include "core/HTMLNames.h"
 #include "core/MathMLNames.h"
 #include "core/css/CSSSelector.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/AXObjectCache.h"
 #include "core/dom/Attr.h"
 #include "core/dom/Attribute.h"
 #include "core/dom/ChildListMutationScope.h"
 #include "core/dom/ChildNodeList.h"
@@ skipping 245 matching lines @@
 NodeRareData& Node::ensureRareData() {
   if (hasRareData())
     return *rareData();
 
   if (isElementNode())
     m_data.m_rareData = ElementRareData::create(m_data.m_layoutObject);
   else
     m_data.m_rareData = NodeRareData::create(m_data.m_layoutObject);
 
   DCHECK(m_data.m_rareData);
-
   setFlag(HasRareDataFlag);
+  ScriptWrappableVisitor::writeBarrier(this, rareData());
   return *rareData();
 }
 
 Node* Node::toNode() {
   return this;
 }
 
 short Node::tabIndex() const {
   return 0;
 }
@@ skipping 1657 matching lines @@
     if (&registry[i]->observer() == &observer) {
       registration = registry[i].get();
       registration->resetObservation(options, attributeFilter);
     }
   }
 
   if (!registration) {
     registry.append(MutationObserverRegistration::create(
         observer, this, options, attributeFilter));
     registration = registry.last().get();
+    ScriptWrappableVisitor::writeBarrier(this, registration);
   }
 
   document().addMutationObserverTypes(registration->mutationTypes());
 }
 
 void Node::unregisterMutationObserver(
     MutationObserverRegistration* registration) {
   HeapVector<Member<MutationObserverRegistration>>* registry =
       mutationObserverRegistry();
   DCHECK(registry);
@@ skipping 479 matching lines @@
   if (node) {
     std::stringstream stream;
     node->printNodePathTo(stream);
     LOG(INFO) << stream.str();
   } else {
     LOG(INFO) << "Cannot showNodePath for <null>";
   }
 }
 
 #endif