Don't use base::MessageLoop::{Quit,QuitClosure} in chrome/

chrome/browser/devtools/device/usb/android_usb_browsertest.cc

 // Copyright 2014 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 <algorithm>
 
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 623 matching lines @@
  public:
   explicit MockCountListener(DevToolsAndroidBridge* adb_bridge)
       : adb_bridge_(adb_bridge), invoked_(0) {}
 
   void DeviceCountChanged(int count) override {
     ++invoked_;
     adb_bridge_->RemoveDeviceCountListener(this);
     Shutdown();
   }
 
-  void Shutdown() { base::MessageLoop::current()->Quit(); }
+  void Shutdown() { base::MessageLoop::current()->QuitWhenIdle(); }
 
   DevToolsAndroidBridge* adb_bridge_;
   int invoked_;
 };
 
 class MockCountListenerWithReAdd : public MockCountListener {
  public:
   explicit MockCountListenerWithReAdd(
       DevToolsAndroidBridge* adb_bridge)
       : MockCountListener(adb_bridge),
@@ skipping 141 matching lines @@
   EXPECT_EQ(2, listener.invoked_);
   EXPECT_EQ(listener.invoked_ - 1, scheduler_invoked_);
   EXPECT_TRUE(base::MessageLoop::current()->IsIdleForTesting());
 }
 
 IN_PROC_BROWSER_TEST_F(AndroidUsbTraitsTest, TestDeviceCounting) {
   MockCountListenerForCheckingTraits listener(adb_bridge_);
   adb_bridge_->AddDeviceCountListener(&listener);
   runner_->Run();
 }