Oilpan: enable appcache + move DocumentLoader to the heap.

Source/web/WebDataSourceImpl.h

 /*
  * Copyright (C) 2009 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 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebDataSourceImpl_h
 #define WebDataSourceImpl_h
 
 #include "core/loader/DocumentLoader.h"
 #include "platform/exported/WrappedResourceRequest.h"
 #include "platform/exported/WrappedResourceResponse.h"
+#include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
 #include "public/web/WebDataSource.h"
 #include "web/WebPluginLoadObserver.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class WebPluginLoadObserver;
 
 class WebDataSourceImpl final : public DocumentLoader, public WebDataSource {
 public:
-    static PassRefPtr<WebDataSourceImpl> create(LocalFrame*, const ResourceRequest&, const SubstituteData&);
+    static PassRefPtrWillBeRawPtr<WebDataSourceImpl> create(LocalFrame*, const ResourceRequest&, const SubstituteData&);
 
     static WebDataSourceImpl* fromDocumentLoader(DocumentLoader* loader)
     {
         return static_cast<WebDataSourceImpl*>(loader);
     }
 
     // WebDataSource methods:
     virtual const WebURLRequest& originalRequest() const override;
     virtual const WebURLRequest& request() const override;
     virtual const WebURLResponse& response() const override;
     virtual bool hasUnreachableURL() const override;
     virtual WebURL unreachableURL() const override;
     virtual void appendRedirect(const WebURL&) override;
     virtual void redirectChain(WebVector<WebURL>&) const override;
     virtual bool isClientRedirect() const override;
     virtual bool replacesCurrentHistoryItem() const override;
     virtual WebNavigationType navigationType() const override;
     virtual ExtraData* extraData() const override;
     virtual void setExtraData(ExtraData*) override;
     virtual void setNavigationStartTime(double) override;
 
     static WebNavigationType toWebNavigationType(NavigationType);
 
     PassOwnPtr<WebPluginLoadObserver> releasePluginLoadObserver() { return m_pluginLoadObserver.release(); }
     static void setNextPluginLoadObserver(PassOwnPtr<WebPluginLoadObserver>);
 
+    DECLARE_VIRTUAL_TRACE();
+
 private:
     WebDataSourceImpl(LocalFrame*, const ResourceRequest&, const SubstituteData&);
     virtual ~WebDataSourceImpl();
+    virtual void detachFromFrame() override;
 
     // Mutable because the const getters will magically sync these to the
     // latest version from WebKit.
     mutable WrappedResourceRequest m_originalRequestWrapper;
     mutable WrappedResourceRequest m_requestWrapper;
     mutable WrappedResourceResponse m_responseWrapper;
 
     OwnPtr<ExtraData> m_extraData;
     OwnPtr<WebPluginLoadObserver> m_pluginLoadObserver;
 };
 
 } // namespace blink
 
 #endif  // WebDataSourceImpl_h