Oilpan: enable appcache + move DocumentLoader to the heap.

Source/core/loader/FrameLoaderClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 114 matching lines @@
         // script) from an insecure source.  Note that the insecure content can
         // spread to other frames in the same origin.
         virtual void didRunInsecureContent(SecurityOrigin*, const KURL&) = 0;
         virtual void didDetectXSS(const KURL&, bool didBlockEntirePage) = 0;
         virtual void didDispatchPingLoader(const KURL&) = 0;
 
         // Transmits the change in the set of watched CSS selectors property
         // that match any element on the frame.
         virtual void selectorMatchChanged(const Vector<String>& addedSelectors, const Vector<String>& removedSelectors) = 0;
 
-        virtual PassRefPtr<DocumentLoader> createDocumentLoader(LocalFrame*, const ResourceRequest&, const SubstituteData&) = 0;
+        virtual PassRefPtrWillBeRawPtr<DocumentLoader> createDocumentLoader(LocalFrame*, const ResourceRequest&, const SubstituteData&) = 0;
 
         virtual String userAgent(const KURL&) = 0;
 
         virtual String doNotTrackValue() = 0;
 
         virtual void transitionToCommittedForNewPage() = 0;
 
         virtual PassRefPtrWillBeRawPtr<LocalFrame> createFrame(const FrameLoadRequest&, const AtomicString& name, HTMLFrameOwnerElement*) = 0;
         // Whether or not plugin creation should fail if the HTMLPlugInElement isn't in the DOM after plugin initialization.
         enum DetachedPluginPolicy {
@@ skipping 92 matching lines @@
             BeforeUnloadHandler,
             UnloadHandler,
         };
         virtual void suddenTerminationDisablerChanged(bool present, SuddenTerminationDisablerType) { }
 
     };
 
 } // namespace blink
 
 #endif // FrameLoaderClient_h