Oilpan: Remove guardRef and guardDeref from TreeScope.

Source/core/dom/TreeScope.cpp

 /*
  * Copyright (C) 2011 Google Inc. All Rights Reserved.
  * Copyright (C) 2012 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
@@ skipping 41 matching lines @@
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 TreeScope::TreeScope(ContainerNode& rootNode, Document& document)
     : m_rootNode(rootNode)
     , m_document(&document)
     , m_parentTreeScope(&document)
+#if !ENABLE(OILPAN)
     , m_guardRefCount(0)
+#endif
     , m_idTargetObserverRegistry(IdTargetObserverRegistry::create())
 {
     ASSERT(rootNode != document);
+#if !ENABLE(OILPAN)
     m_parentTreeScope->guardRef();
+#endif
     m_rootNode.setTreeScope(this);
 }
 
 TreeScope::TreeScope(Document& document)
     : m_rootNode(document)
     , m_document(&document)
-    , m_parentTreeScope(0)
+    , m_parentTreeScope(nullptr)
+#if !ENABLE(OILPAN)
     , m_guardRefCount(0)
+#endif
     , m_idTargetObserverRegistry(IdTargetObserverRegistry::create())
 {
     m_rootNode.setTreeScope(this);
 }
 
 TreeScope::~TreeScope()
 {
+#if !ENABLE(OILPAN)
     ASSERT(!m_guardRefCount);
+#endif
     m_rootNode.setTreeScope(0);
 
+#if !ENABLE(OILPAN)
     if (m_selection) {
         m_selection->clearTreeScope();
         m_selection = nullptr;
     }
 
     if (m_parentTreeScope)
         m_parentTreeScope->guardDeref();
+#endif
 }
 
 TreeScope* TreeScope::olderShadowRootOrParentTreeScope() const
 {
     if (rootNode().isShadowRoot()) {
         if (ShadowRoot* olderShadowRoot = toShadowRoot(rootNode()).olderShadowRoot())
             return olderShadowRoot;
     }
     return parentTreeScope();
 }
@@ skipping 17 matching lines @@
     m_elementsById.clear();
     m_imageMapsByName.clear();
     m_labelsByForAttribute.clear();
 }
 
 void TreeScope::setParentTreeScope(TreeScope& newParentScope)
 {
     // A document node cannot be re-parented.
     ASSERT(!rootNode().isDocumentNode());
 
+#if !ENABLE(OILPAN)
     newParentScope.guardRef();
     if (m_parentTreeScope)
         m_parentTreeScope->guardDeref();
+#endif
     m_parentTreeScope = &newParentScope;
     setDocument(newParentScope.document());
 }
 
 Element* TreeScope::getElementById(const AtomicString& elementId) const
 {
     if (elementId.isEmpty())
         return 0;
     if (!m_elementsById)
         return 0;
@@ skipping 372 matching lines @@
 {
     for (Element* element = ElementTraversal::firstWithin(rootNode()); element; element = ElementTraversal::nextIncludingPseudo(*element)) {
         for (ShadowRoot* root = element->youngestShadowRoot(); root; root = root->olderShadowRoot())
             root->setNeedsStyleRecalcForViewportUnits();
         RenderStyle* style = element->renderStyle();
         if (style && style->hasViewportUnits())
             element->setNeedsStyleRecalc(LocalStyleChange);
     }
 }
 
+void TreeScope::trace(Visitor* visitor)
+{
+    visitor->trace(m_parentTreeScope);
+    visitor->trace(m_selection);
+}
+
 } // namespace WebCore