Make sure that the UI window created by base::MessagePumpForUI is destoyed on the same thread (Wind…

base/message_loop/message_pump_mac.mm

 // 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.
 
 #import "base/message_loop/message_pump_mac.h"
 
 #import <Foundation/Foundation.h>
 
 #include <limits>
 
@@ skipping 189 matching lines @@
 }
 
 // Must be called on the run loop thread.
 void MessagePumpCFRunLoopBase::ScheduleDelayedWork(
     const TimeTicks& delayed_work_time) {
   TimeDelta delta = delayed_work_time - TimeTicks::Now();
   delayed_work_fire_time_ = CFAbsoluteTimeGetCurrent() + delta.InSecondsF();
   CFRunLoopTimerSetNextFireDate(delayed_work_timer_, delayed_work_fire_time_);
 }
 
+void MessagePumpCFRunLoopBase::Shutdown() {
+}
+
 // Called from the run loop.
 // static
 void MessagePumpCFRunLoopBase::RunDelayedWorkTimer(CFRunLoopTimerRef timer,
                                                    void* info) {
   MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
 
   // The timer won't fire again until it's reset.
   self->delayed_work_fire_time_ = kCFTimeIntervalMax;
 
   // CFRunLoopTimers fire outside of the priority scheme for CFRunLoopSources.
@@ skipping 472 matching lines @@
     [NSApplication sharedApplication];
     g_not_using_cr_app = true;
     return new MessagePumpNSApplication;
 #endif
   }
 
   return new MessagePumpNSRunLoop;
 }
 
 }  // namespace base