Hotlist Slow: Remove extra thread pool created by VolumeMountWatcherWin.

components/storage_monitor/storage_monitor_win_unittest.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 <windows.h>
 #include <dbt.h>
 
 #include <string>
 #include <vector>
 
@@ skipping 79 matching lines @@
                                            new TestPortableDeviceWatcherWin));
 
   monitor_->Init();
   RunUntilIdle();
   monitor_->AddObserver(&observer_);
 }
 
 void StorageMonitorWinTest::TearDown() {
   RunUntilIdle();
   monitor_->RemoveObserver(&observer_);
-  volume_mount_watcher_->ShutdownWorkerPool();
 
   // Windows storage monitor must be destroyed on the same thread
   // as construction.
   monitor_.reset();
 }
 
 void StorageMonitorWinTest::PreAttachDevices() {
   monitor_.reset();
   volume_mount_watcher_ = new TestVolumeMountWatcherWin;
   volume_mount_watcher_->SetAttachedDevicesFake();
@@ skipping 429 matching lines @@
         TestPortableDeviceWatcherWin::kMTPDeviceWithValidInfo);
     EXPECT_EQ(expected, pnp_device_id);
     EXPECT_EQ(it->object_persistent_id,
               TestPortableDeviceWatcherWin::GetMTPStorageUniqueId(
                   pnp_device_id, storage_object_id));
   }
   DoMTPDeviceTest(TestPortableDeviceWatcherWin::kMTPDeviceWithValidInfo, false);
 }
 
 }  // namespace storage_monitor