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

chrome/common/extensions/extension_localization_peer.h

Index: chrome/common/extensions/extension_localization_peer.h
diff --git a/chrome/common/extensions/extension_localization_peer.h b/chrome/common/extensions/extension_localization_peer.h
index 1f8877566e30531e4d35089a6ebfcb6b836c2a4a..b34d516cf4b9fa79dbe573e504ef6ef122098773 100644
--- a/chrome/common/extensions/extension_localization_peer.h
+++ b/chrome/common/extensions/extension_localization_peer.h
@@ -34,17 +34,22 @@ class ExtensionLocalizationPeer
   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;
@@ -75,6 +80,10 @@ class ExtensionLocalizationPeer
   // 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);
 };