Move component updater artifacts into component_updater namespace.

chrome/browser/component_updater/pnacl/pnacl_profile_observer.cc

 // Copyright (c) 2013 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/component_updater/pnacl/pnacl_profile_observer.h"
 
 #include "base/logging.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/component_updater/pnacl/pnacl_component_installer.h"
 #include "content/public/browser/notification_service.h"
 
+namespace component_updater {
+
 PnaclProfileObserver::PnaclProfileObserver(
     PnaclComponentInstaller* installer) : pnacl_installer_(installer) {
   // We only need to observe NOTIFICATION_LOGIN_USER_CHANGED for ChromeOS
   // (and it's only defined for ChromeOS).
 #if defined(OS_CHROMEOS)
   registrar_.Add(this,
                  chrome::NOTIFICATION_LOGIN_USER_CHANGED,
                  content::NotificationService::AllSources());
 #endif
 }
 
 PnaclProfileObserver::~PnaclProfileObserver() { }
 
 void PnaclProfileObserver::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
 #if defined(OS_CHROMEOS)
   if (type == chrome::NOTIFICATION_LOGIN_USER_CHANGED) {
     pnacl_installer_->ReRegisterPnacl();
     return;
   }
   NOTREACHED() << "Unexpected notification observed";
 #endif
 }
+
+}  // namespace component_updater