Oilpan: Prepare to support garbage-collected Node in WebNode hierarchy.

Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 834 matching lines @@
         client->draggableRegionsChanged();
 }
 
 void ChromeClientImpl::didAssociateFormControls(const Vector<RefPtr<Element> >& elements)
 {
     if (!m_webView->autofillClient())
         return;
     WebVector<WebNode> elementVector(static_cast<size_t>(elements.size()));
     size_t elementsCount = elements.size();
     for (size_t i = 0; i < elementsCount; ++i)
-        elementVector[i] = elements[i];
+        elementVector[i] = elements[i].get();
     m_webView->autofillClient()->didAssociateFormControls(elementVector);
 }
 
 void ChromeClientImpl::didCancelCompositionOnSelectionChange()
 {
     if (m_webView->client())
         m_webView->client()->didCancelCompositionOnSelectionChange();
 }
 
 void ChromeClientImpl::willSetInputMethodState()
@@ skipping 81 matching lines @@
 {
     return static_cast<NavigatorContentUtilsClient::CustomHandlersState>(m_webView->client()->isProtocolHandlerRegistered(scheme, baseURL, url));
 }
 
 void NavigatorContentUtilsClientImpl::unregisterProtocolHandler(const String& scheme, const WebCore::KURL& baseURL, const WebCore::KURL& url)
 {
     m_webView->client()->unregisterProtocolHandler(scheme, baseURL, url);
 }
 
 } // namespace blink