Preserve original int64 time stamp in ResourceResponse.

public/platform/Platform.h

 /*
  * 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:
  *
  *     * 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 288 matching lines @@
     // May return null.
     virtual WebPrescientNetworking* prescientNetworking() { return 0; }
 
     // Returns a new WebSocketHandle instance.
     virtual WebSocketHandle* createWebSocketHandle() { return 0; }
 
     // Returns the User-Agent string.
     virtual WebString userAgent() { return WebString(); }
 
     // A suggestion to cache this metadata in association with this URL.
+    virtual void cacheMetadata(const WebURL&, int64 responseTime, const char* data, size_t dataSize) { }
     virtual void cacheMetadata(const WebURL&, double responseTime, const char* data, size_t dataSize) { }
 
     // Returns the decoded data url if url had a supported mimetype and parsing was successful.
     virtual WebData parseDataURL(const WebURL&, WebString& mimetype, WebString& charset) { return WebData(); }
 
     virtual WebURLError cancelledError(const WebURL&) const { return WebURLError(); }
 
     virtual bool isReservedIPAddress(const WebString& host) const { return false; }
 
     // Plugins -------------------------------------------------------------
@@ skipping 347 matching lines @@
 protected:
     BLINK_PLATFORM_EXPORT Platform();
     virtual ~Platform() { }
 
     WebThread* m_mainThread;
 };
 
 } // namespace blink
 
 #endif