Oilpan: move HistoryItem to the heap.

Source/web/ContextMenuClientImpl.cpp

 /*
  * Copyright (C) 2009, 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 289 matching lines @@
 
     // If it's not a link, an image, a media element, or an image/media link,
     // show a selection menu or a more generic page menu.
     if (selectedFrame->document()->loader())
         data.frameEncoding = selectedFrame->document()->encodingName();
 
     // Send the frame and page URLs in any case.
     data.pageURL = urlFromFrame(m_webView->mainFrameImpl()->frame());
     if (selectedFrame != m_webView->mainFrameImpl()->frame()) {
         data.frameURL = urlFromFrame(selectedFrame);
-        RefPtr<HistoryItem> historyItem = selectedFrame->loader().currentItem();
+        RefPtrWillBeRawPtr<HistoryItem> historyItem = selectedFrame->loader().currentItem();
         if (historyItem)
             data.frameHistoryItem = WebHistoryItem(historyItem);
     }
 
     if (r.isSelected()) {
         if (!isHTMLInputElement(*r.innerNonSharedNode()) || toHTMLInputElement(r.innerNonSharedNode())->type() != InputTypeNames::password)
             data.selectedText = selectedFrame->selectedText().stripWhiteSpace();
     }
 
     if (r.isContentEditable()) {
@@ skipping 117 matching lines @@
         outputItems[i] = subItems[i];
     subMenuItems.swap(outputItems);
 }
 
 void ContextMenuClientImpl::populateCustomMenuItems(const ContextMenu* defaultMenu, WebContextMenuData* data)
 {
     populateSubMenuItems(defaultMenu->items(), data->customItems);
 }
 
 } // namespace blink