Revert of Oilpan: enable appcache + move DocumentLoader to the heap.

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 2635 matching lines @@
         if (m_loadEventProgress < PageHideInProgress) {
             m_loadEventProgress = PageHideInProgress;
             if (LocalDOMWindow* window = domWindow())
                 window->dispatchEvent(PageTransitionEvent::create(EventTypeNames::pagehide, false), this);
             if (!m_frame)
                 return;
 
             // The DocumentLoader (and thus its DocumentLoadTiming) might get destroyed
             // while dispatching the event, so protect it to prevent writing the end
             // time into freed memory.
-            RefPtrWillBeRawPtr<DocumentLoader> documentLoader = m_frame->loader().provisionalDocumentLoader();
+            RefPtr<DocumentLoader> documentLoader =  m_frame->loader().provisionalDocumentLoader();
             m_loadEventProgress = UnloadEventInProgress;
             RefPtrWillBeRawPtr<Event> unloadEvent(Event::create(EventTypeNames::unload));
             if (documentLoader && !documentLoader->timing().unloadEventStart() && !documentLoader->timing().unloadEventEnd()) {
                 DocumentLoadTiming& timing = documentLoader->timing();
                 ASSERT(timing.navigationStart());
                 timing.markUnloadEventStart();
                 m_frame->localDOMWindow()->dispatchEvent(unloadEvent, this);
                 timing.markUnloadEventEnd();
             } else {
                 m_frame->localDOMWindow()->dispatchEvent(unloadEvent, m_frame->document());
@@ skipping 2584 matching lines @@
     return loader;
 }
 
 Node* eventTargetNodeForDocument(Document* doc)
 {
     if (!doc)
         return 0;
     Node* node = doc->focusedElement();
     if (!node && doc->isPluginDocument()) {
         PluginDocument* pluginDocument = toPluginDocument(doc);
-        node = pluginDocument->pluginNode();
+        node =  pluginDocument->pluginNode();
     }
     if (!node && doc->isHTMLDocument())
         node = doc->body();
     if (!node)
         node = doc->documentElement();
     return node;
 }
 
 void Document::adjustFloatQuadsForScrollAndAbsoluteZoom(Vector<FloatQuad>& quads, LayoutObject& layoutObject)
 {
@@ skipping 495 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif