Move the number conversions from string_util to a new file....

net/proxy/proxy_config.cc

Index: net/proxy/proxy_config.cc
===================================================================
--- net/proxy/proxy_config.cc	(revision 54340)
+++ net/proxy/proxy_config.cc	(working copy)
@@ -1,9 +1,11 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
 #include "net/proxy/proxy_config.h"
 
+#include "base/logging.h"
+#include "base/string_number_conversions.h"
 #include "base/string_tokenizer.h"
 #include "base/string_util.h"
 #include "net/proxy/proxy_info.h"
@@ -176,7 +178,7 @@
       type = "TYPE_SINGLE_PROXY";
       break;
     default:
-      type = IntToString(rules.type);
+      type = base::IntToString(rules.type);
       break;
   }
   return out << "  {\n"