Move component updater artifacts into component_updater namespace.

chrome/browser/component_updater/component_updater_configurator.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_CONFIGURATOR_H_
 #define CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_CONFIGURATOR_H_
 
 #include "chrome/browser/component_updater/component_updater_service.h"
 
 class CommandLine;
 
 namespace net {
+class URLRequestContextGetter;
+}
 
-class URLRequestContextGetter;
-
-} // namespace
+namespace component_updater {
 
 ComponentUpdateService::Configurator* MakeChromeComponentUpdaterConfigurator(
     const CommandLine* cmdline, net::URLRequestContextGetter* context_getter);
 
+}  // namespace component_updater
+
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UPDATER_CONFIGURATOR_H_