Move chromeos code to namespace chromeos.

chrome/browser/chromeos/clock_menu_button.h

 // Copyright (c) 2009 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_CHROMEOS_CLOCK_MENU_BUTTON_H_
 #define CHROME_BROWSER_CHROMEOS_CLOCK_MENU_BUTTON_H_
 
 #include "base/timer.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/pref_member.h"
 #include "views/controls/button/menu_button.h"
 #include "views/controls/menu/menu_2.h"
 #include "views/controls/menu/view_menu_delegate.h"
 
 class Browser;
 
+namespace chromeos {
+
 // The clock menu button in the status area.
 // This button shows the current time.
 class ClockMenuButton : public views::MenuButton,
                         public views::ViewMenuDelegate,
                         public views::Menu2Model,
                         public NotificationObserver {
  public:
   explicit ClockMenuButton(Browser* browser);
   virtual ~ClockMenuButton() {}
 
@@ skipping 36 matching lines @@
 
   // The clock menu.
   views::Menu2 clock_menu_;
 
   // The browser window that owns us.
   Browser* browser_;
 
   DISALLOW_COPY_AND_ASSIGN(ClockMenuButton);
 };
 
+}  // namespace chromeos
+
 #endif  // CHROME_BROWSER_CHROMEOS_CLOCK_MENU_BUTTON_H_