ui: Use base::MessageLoop.

ui/views/controls/button/button_dropdown.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 "ui/views/controls/button/button_dropdown.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
@@ skipping 49 matching lines @@
 
 bool ButtonDropDown::OnMousePressed(const ui::MouseEvent& event) {
   if (enabled() && ShouldShowMenu() &&
       IsTriggerableEvent(event) && HitTestPoint(event.location())) {
     // Store the y pos of the mouse coordinates so we can use them later to
     // determine if the user dragged the mouse down (which should pop up the
     // drag down menu immediately, instead of waiting for the timer)
     y_position_on_lbuttondown_ = event.y();
 
     // Schedule a task that will show the menu.
-    MessageLoop::current()->PostDelayedTask(
+    base::MessageLoop::current()->PostDelayedTask(
         FROM_HERE,
         base::Bind(&ButtonDropDown::ShowDropDownMenu,
                    show_menu_factory_.GetWeakPtr()),
         base::TimeDelta::FromMilliseconds(kMenuTimerDelay));
   }
   return ImageButton::OnMousePressed(event);
 }
 
 bool ButtonDropDown::OnMouseDragged(const ui::MouseEvent& event) {
   bool result = ImageButton::OnMouseDragged(event);
@@ skipping 138 matching lines @@
     SetState(STATE_NORMAL);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 //
 // ButtonDropDown - Accessibility
 //
 ////////////////////////////////////////////////////////////////////////////////
 
 }  // namespace views