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

chrome/browser/extensions/extension_infobar_module.cc

 // 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 "chrome/browser/extensions/extension_infobar_module.h"
 
 #include "base/string_util.h"
+#include "base/string_number_conversions.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_infobar_module_constants.h"
 #include "chrome/browser/extensions/extension_infobar_delegate.h"
 #include "chrome/browser/extensions/extension_tabs_module.h"
 #include "chrome/browser/extensions/extension_tabs_module_constants.h"
 #include "chrome/browser/tab_contents/infobar_delegate.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_error_utils.h"
@@ skipping 20 matching lines @@
   if (!ExtensionTabUtil::GetTabById(
       tab_id,
       profile(),
       include_incognito(),
       &browser,
       NULL,
       &tab_contents,
       NULL)) {
     error_ = ExtensionErrorUtils::FormatErrorMessage(
         extension_tabs_module_constants::kTabNotFoundError,
-        IntToString(tab_id));
+        base::IntToString(tab_id));
     return false;
   }
 
   tab_contents->AddInfoBar(
       new ExtensionInfoBarDelegate(browser, tab_contents, GetExtension(), url));
 
   // TODO(finnur): Return the actual DOMWindow object. Bug 26463.
   result_.reset(ExtensionTabUtil::CreateWindowValue(browser, false));
 
   return true;
 }