chrome: Use base::MessageLoop. (Part 3)

chrome/browser/chromeos/system_key_event_listener.cc

 // Copyright (c) 2012 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/chromeos/system_key_event_listener.h"
 
 #define XK_MISCELLANY 1
 #include <X11/keysymdef.h>
 #include <X11/XF86keysym.h>
 #include <X11/XKBlib.h>
@@ skipping 52 matching lines @@
                          &xkb_minor_version)) {
     LOG(WARNING) << "Could not query Xkb extension";
   }
 
   if (!XkbSelectEvents(display, XkbUseCoreKbd,
                        XkbStateNotifyMask,
                        XkbStateNotifyMask)) {
     LOG(WARNING) << "Could not install Xkb Indicator observer";
   }
 
-  MessageLoopForUI::current()->AddObserver(this);
+  base::MessageLoopForUI::current()->AddObserver(this);
 }
 
 SystemKeyEventListener::~SystemKeyEventListener() {
   Stop();
 }
 
 void SystemKeyEventListener::Stop() {
   if (stopped_)
     return;
-  MessageLoopForUI::current()->RemoveObserver(this);
+  base::MessageLoopForUI::current()->RemoveObserver(this);
   stopped_ = true;
 }
 
 void SystemKeyEventListener::AddCapsLockObserver(CapsLockObserver* observer) {
   caps_lock_observers_.AddObserver(observer);
 }
 
 void SystemKeyEventListener::AddModifiersObserver(ModifiersObserver* observer) {
   modifiers_observers_.AddObserver(observer);
 }
@@ skipping 59 matching lines @@
         pressed_modifiers_ = current_modifiers;
         OnModifiers(pressed_modifiers_);
       }
       return true;
     }
   }
   return false;
 }
 
 }  // namespace chromeos