Adding histograms showing fraction of page load times

net/http/http_network_layer.h

Index: net/http/http_network_layer.h
===================================================================
--- net/http/http_network_layer.h	(revision 148459)
+++ net/http/http_network_layer.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -47,7 +47,8 @@
   static void EnableSpdy(const std::string& mode);
 
   // HttpTransactionFactory methods:
-  virtual int CreateTransaction(scoped_ptr<HttpTransaction>* trans) OVERRIDE;
+  virtual int CreateTransaction(scoped_ptr<HttpTransaction>* trans,
+                                HttpTransactionDelegate* delegate) OVERRIDE;
   virtual HttpCache* GetCache() OVERRIDE;
   virtual HttpNetworkSession* GetSession() OVERRIDE;