Use a monotonic clock (TimeTicks) to report network times to WebCore.

content/public/common/resource_response.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #ifndef CONTENT_PUBLIC_COMMON_RESOURCE_RESPONSE_H_
 #define CONTENT_PUBLIC_COMMON_RESOURCE_RESPONSE_H_
 #pragma once
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "googleurl/src/gurl.h"
 #include "net/url_request/url_request_status.h"
 #include "webkit/glue/resource_loader_bridge.h"
 
 namespace content {
 
 // Parameters for a resource response header.
 struct ResourceResponseHead : webkit_glue::ResourceResponseInfo {
   // The response status.
   net::URLRequestStatus status;
+  // TimeTicks::Now() when the browser received the request from the renderer.
+  base::TimeTicks request_start;
+  // TimeTicks::Now() when the browser sent the response to the renderer.
+  base::TimeTicks response_start;
 };
 
 // Parameters for a synchronous resource response.
 struct SyncLoadResult : ResourceResponseHead {
   // The final URL after any redirects.
   GURL final_url;
 
   // The response data.
   std::string data;
 };
 
 // Simple wrapper that refcounts ResourceResponseHead.
 struct CONTENT_EXPORT ResourceResponse
     : public NON_EXPORTED_BASE(ResourceResponseHead),
       public base::RefCounted<ResourceResponse> {
 
  private:
   friend class base::RefCounted<ResourceResponse>;
 
   ~ResourceResponse() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_RESOURCE_RESPONSE_H_