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..346d06ec3c390a12a55daa0a086ff1306d7a222c 100644
--- a/chrome/common/extensions/extension_localization_peer.h
+++ b/chrome/common/extensions/extension_localization_peer.h
@@ -42,9 +42,10 @@ class ExtensionLocalizationPeer
   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;