Move synchronously fetching to ResourceFetcher, as well as most of the logic

Source/core/loader/FrameFetchContext.h

Index: Source/core/loader/FrameFetchContext.h
diff --git a/Source/core/loader/FrameFetchContext.h b/Source/core/loader/FrameFetchContext.h
index cc5426ad77830ecb7a32ad4849c13f9c3264ad5f..77a92afb05a4b37aeab6b7208a8df1429c8bc9b5 100644
--- a/Source/core/loader/FrameFetchContext.h
+++ b/Source/core/loader/FrameFetchContext.h
@@ -54,6 +54,7 @@ public:
     virtual CachePolicy cachePolicy(Resource::Type) const OVERRIDE;
     virtual void dispatchDidChangeResourcePriority(unsigned long identifier, ResourceLoadPriority);
     virtual void dispatchWillSendRequest(DocumentLoader*, unsigned long identifier, ResourceRequest&, const ResourceResponse& redirectResponse, const FetchInitiatorInfo& = FetchInitiatorInfo()) OVERRIDE;
+    virtual void dispatchDidLoadResourceFromMemoryCache(const ResourceRequest&, const ResourceResponse&) OVERRIDE;
     virtual void dispatchDidReceiveResponse(DocumentLoader*, unsigned long identifier, const ResourceResponse&, ResourceLoader* = 0) OVERRIDE;
     virtual void dispatchDidReceiveData(DocumentLoader*, unsigned long identifier, const char* data, int dataLength, int encodedDataLength)  OVERRIDE;
     virtual void dispatchDidFinishLoading(DocumentLoader*, unsigned long identifier, double finishTime) OVERRIDE;