[oilpan]: get rid of some trivial RefPtr's to node.

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/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 490 matching lines @@
 {
     if (ContainerNode* parent = parentNode())
         parent->removeChild(this, exceptionState);
 }
 
 void Node::normalize()
 {
     // Go through the subtree beneath us, normalizing all nodes. This means that
     // any two adjacent text nodes are merged and any empty text nodes are removed.
 
-    RefPtr<Node> node = this;
+    RefPtrWillBeRawPtr<Node> node = this;
     while (Node* firstChild = node->firstChild())
         node = firstChild;
     while (node) {
         if (node->isElementNode())
             toElement(node)->normalizeAttributes();
 
         if (node == this)
             break;
 
         if (node->nodeType() == TEXT_NODE)
@@ skipping 990 matching lines @@
         case TEXT_NODE:
         case CDATA_SECTION_NODE:
         case COMMENT_NODE:
         case PROCESSING_INSTRUCTION_NODE:
             setNodeValue(text);
             return;
         case ELEMENT_NODE:
         case ATTRIBUTE_NODE:
         case DOCUMENT_FRAGMENT_NODE: {
             // FIXME: Merge this logic into replaceChildrenWithText.
-            RefPtr<ContainerNode> container = toContainerNode(this);
+            RefPtrWillBeRawPtr<ContainerNode> container = toContainerNode(this);
             // No need to do anything if the text is identical.
             if (container->hasOneTextChild() && toText(container->firstChild())->data() == text)
                 return;
             ChildListMutationScope mutation(*this);
             container->removeChildren();
             // Note: This API will not insert empty text nodes:
             // http://dom.spec.whatwg.org/#dom-node-textcontent
             if (!text.isEmpty())
                 container->appendChild(document().createTextNode(text), ASSERT_NO_EXCEPTION);
             return;
@@ skipping 625 matching lines @@
         return;
 
     size_t index = registry->find(registration);
     ASSERT(index != kNotFound);
     if (index == kNotFound)
         return;
 
     // Deleting the registration may cause this node to be derefed, so we must make sure the Vector operation completes
     // before that, in case |this| is destroyed (see MutationObserverRegistration::m_registrationNodeKeepAlive).
     // FIXME: Simplify the registration/transient registration logic to make this understandable by humans.
-    RefPtr<Node> protect(this);
+    RefPtrWillBeRawPtr<Node> protect(this);
 #if ENABLE(OILPAN)
     // The explicit dispose() is needed to have the registration
     // object unregister itself promptly.
     registration->dispose();
 #endif
     registry->remove(index);
 }
 
 void Node::registerTransientMutationObserver(MutationObserverRegistration* registration)
 {
@@ skipping 417 matching lines @@
         node->showTreeForThis();
 }
 
 void showNodePath(const WebCore::Node* node)
 {
     if (node)
         node->showNodePathForThis();
 }
 
 #endif