Preserve original int64 time stamp in ResourceResponse.

public/platform/WebURLResponse.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 74 matching lines @@
 
     BLINK_PLATFORM_EXPORT bool connectionReused() const;
     BLINK_PLATFORM_EXPORT void setConnectionReused(bool);
 
     BLINK_PLATFORM_EXPORT WebURLLoadTiming loadTiming();
     BLINK_PLATFORM_EXPORT void setLoadTiming(const WebURLLoadTiming&);
 
     BLINK_PLATFORM_EXPORT WebHTTPLoadInfo httpLoadInfo();
     BLINK_PLATFORM_EXPORT void setHTTPLoadInfo(const WebHTTPLoadInfo&);
 
-    BLINK_PLATFORM_EXPORT double responseTime() const;
     BLINK_PLATFORM_EXPORT void setResponseTime(double);
+    BLINK_PLATFORM_EXPORT void setResponseTime(long long);
 
     BLINK_PLATFORM_EXPORT WebString mimeType() const;
     BLINK_PLATFORM_EXPORT void setMIMEType(const WebString&);
 
     BLINK_PLATFORM_EXPORT long long expectedContentLength() const;
     BLINK_PLATFORM_EXPORT void setExpectedContentLength(long long);
 
     BLINK_PLATFORM_EXPORT WebString textEncodingName() const;
     BLINK_PLATFORM_EXPORT void setTextEncodingName(const WebString&);
 
@@ skipping 105 matching lines @@
 protected:
     BLINK_PLATFORM_EXPORT void assign(WebURLResponsePrivate*);
 
 private:
     WebURLResponsePrivate* m_private;
 };
 
 } // namespace blink
 
 #endif