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

chrome/common/extensions/extension_localization_peer.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.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_LOCALIZATION_PEER_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_LOCALIZATION_PEER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 16 matching lines @@
       webkit_glue::ResourceLoaderBridge::Peer* peer,
       IPC::Message::Sender* message_sender,
       const std::string& mime_type,
       const GURL& request_url);
 
   // ResourceLoaderBridge::Peer methods.
   virtual void OnUploadProgress(uint64 position, uint64 size) OVERRIDE;
   virtual bool OnReceivedRedirect(
       const GURL& new_url,
       const webkit_glue::ResourceResponseInfo& info,
+      const base::TimeTicks& request_start_time,
+      const base::TimeTicks& response_start_time,
       bool* has_new_first_party_for_cookies,
       GURL* new_first_party_for_cookies) OVERRIDE;
   virtual void OnReceivedResponse(
-      const webkit_glue::ResourceResponseInfo& info) OVERRIDE;
+      const webkit_glue::ResourceResponseInfo& info,
+      const base::TimeTicks& request_start_time,
+      const base::TimeTicks& response_start_time);
   virtual void OnDownloadedData(int len) OVERRIDE {}
   virtual void OnReceivedData(const char* data,
                               int data_length,
                               int encoded_data_length) OVERRIDE;
-  virtual void OnCompletedRequest(const net::URLRequestStatus& status,
-                                  const std::string& security_info,
-                                  const base::Time& completion_time) OVERRIDE;
+  virtual void OnCompletedRequest(
+      const net::URLRequestStatus& status,
+      const std::string& security_info,
+      const base::TimeTicks& completion_time) OVERRIDE;
 
  private:
   friend class ExtensionLocalizationPeerTest;
 
   // Use CreateExtensionLocalizationPeer to create an instance.
   ExtensionLocalizationPeer(
       webkit_glue::ResourceLoaderBridge::Peer* peer,
       IPC::Message::Sender* message_sender,
       const GURL& request_url);
 
@@ skipping 10 matching lines @@
   // Sends ExtensionHostMsg_GetMessageBundle message to the browser to fetch
   // message catalog.
   IPC::Message::Sender* message_sender_;
 
   // Buffer for incoming data. We wait until OnCompletedRequest before using it.
   std::string data_;
 
   // Original request URL.
   GURL request_url_;
 
+  // When the request started and the initial response was returned.
+  base::TimeTicks request_start_time_;
+  base::TimeTicks response_start_time_;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(ExtensionLocalizationPeer);
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_LOCALIZATION_PEER_H_