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

Source/web/FrameLoaderClientImpl.cpp

Index: Source/web/FrameLoaderClientImpl.cpp
diff --git a/Source/web/FrameLoaderClientImpl.cpp b/Source/web/FrameLoaderClientImpl.cpp
index 426c9d2ff0537bea23cd71b67ec77dbceb9b214f..d1d7afe4f92082c25babf6e5de49ef271fa3123d 100644
--- a/Source/web/FrameLoaderClientImpl.cpp
+++ b/Source/web/FrameLoaderClientImpl.cpp
@@ -650,9 +650,9 @@
         client->didMatchCSS(m_webFrame, WebVector<WebString>(addedSelectors), WebVector<WebString>(removedSelectors));
 }
 
-PassRefPtrWillBeRawPtr<DocumentLoader> FrameLoaderClientImpl::createDocumentLoader(LocalFrame* frame, const ResourceRequest& request, const SubstituteData& data)
-{
-    RefPtrWillBeRawPtr<WebDataSourceImpl> ds = WebDataSourceImpl::create(frame, request, data);
+PassRefPtr<DocumentLoader> FrameLoaderClientImpl::createDocumentLoader(LocalFrame* frame, const ResourceRequest& request, const SubstituteData& data)
+{
+    RefPtr<WebDataSourceImpl> ds = WebDataSourceImpl::create(frame, request, data);
     if (m_webFrame->client())
         m_webFrame->client()->didCreateDataSource(m_webFrame, ds.get());
     return ds.release();