[Not for review] record detailed time breakdown of SW related requests.

third_party/WebKit/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 146 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 void setResponseTime(long long);
+  BLINK_PLATFORM_EXPORT void setResponseStart(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 156 matching lines @@
   // instance it contains.
   std::unique_ptr<ResourceResponseContainer> m_ownedResourceResponse;
 
   // Should never be null.
   ResourceResponse* m_resourceResponse;
 };
 
 }  // namespace blink
 
 #endif