Don't use base::MessageLoop::{Quit,QuitClosure} in ash/, chromeos/, device/

ash/drag_drop/drag_drop_interactive_uitest.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 "ash/drag_drop/drag_drop_controller.h"
 
 #include "ash/shell.h"
 #include "ash/test/ash_interactive_ui_test_base.h"
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 64 matching lines @@
   params.context = Shell::GetPrimaryRootWindow();
   params.bounds = bounds;
   widget->Init(params);
 
   widget->SetContentsView(contents_view);
   widget->Show();
   return widget;
 }
 
 void QuitLoop() {
-  base::MessageLoop::current()->Quit();
+  base::MessageLoop::current()->QuitWhenIdle();
 }
 
 void DragDropAcrossMultiDisplay_Step4() {
   ui_controls::SendMouseEventsNotifyWhenDone(
       ui_controls::LEFT, ui_controls::UP,
       base::Bind(&QuitLoop));
 }
 
 void DragDropAcrossMultiDisplay_Step3() {
   // Move to the edge of the 1st display so that the mouse
@@ skipping 54 matching lines @@
 
   base::MessageLoop::current()->Run();
 
   EXPECT_TRUE(target_view->dropped());
 
   source->Close();
   target->Close();
 }
 
 }  // namespace ash