Remove DeviceMonitorLinux::WillDestroyCurrentMessageLoop().

device/hid/hid_service.h

 // 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.
 
 #ifndef DEVICE_HID_HID_SERVICE_H_
 #define DEVICE_HID_HID_SERVICE_H_
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/bind_helpers.h"
+#include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_checker.h"
 #include "device/hid/hid_device_info.h"
 
 namespace device {
 
 class HidConnection;
@@ skipping 21 matching lines @@
   typedef base::Callback<void(scoped_refptr<HidConnection> connection)>
       ConnectCallback;
 
   // This function should be called on a thread with a MessageLoopForUI and be
   // passed the task runner for a thread with a MessageLoopForIO.
   static std::unique_ptr<HidService> Create(
       scoped_refptr<base::SingleThreadTaskRunner> file_task_runner);
 
   virtual ~HidService();
 
+  // Shuts down the HidService. Must be called before destroying the HidService
+  // when tasks can still be posted to the |file_task_runner| provided to
+  // Create().
+  virtual void Shutdown();
+
   // Enumerates available devices. The provided callback will always be posted
   // to the calling thread's task runner.
   virtual void GetDevices(const GetDevicesCallback& callback);
 
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   // Fills in a DeviceInfo struct with info for the given device_id.
   // Returns |nullptr| if |device_id| is invalid.
   scoped_refptr<HidDeviceInfo> GetDeviceInfo(
@@ skipping 14 matching lines @@
   void AddDevice(scoped_refptr<HidDeviceInfo> info);
   void RemoveDevice(const HidDeviceId& device_id);
   void FirstEnumerationComplete();
 
   const DeviceMap& devices() const { return devices_; }
 
   base::ThreadChecker thread_checker_;
 
  private:
   DeviceMap devices_;
-  bool enumeration_ready_;
+  bool enumeration_ready_ = false;
   std::vector<GetDevicesCallback> pending_enumerations_;
   base::ObserverList<Observer, true> observer_list_;
 
+#if DCHECK_IS_ON()
+  bool did_shutdown_ = false;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(HidService);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_HID_HID_SERVICE_H_