Fix HidService lifetime issues.

extensions/browser/api/hid/hid_device_manager.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 EXTENSIONS_BROWSER_API_HID_HID_DEVICE_MANAGER_H_
 #define EXTENSIONS_BROWSER_API_HID_HID_DEVICE_MANAGER_H_
 
 #include <stdint.h>
 
 #include <map>
 
 #include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/message_loop/message_loop_proxy.h"
 #include "base/threading/thread_checker.h"
 #include "device/hid/hid_device_info.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/common/api/hid.h"
 
 namespace extensions {
 
 class HidDeviceManager : public BrowserContextKeyedAPI {
  public:
   explicit HidDeviceManager(content::BrowserContext* context);
@@ skipping 22 matching lines @@
   base::ThreadChecker thread_checker_;
 
   int next_resource_id_;
 
   typedef std::map<int, device::HidDeviceId> ResourceIdToDeviceIdMap;
   typedef std::map<device::HidDeviceId, int> DeviceIdToResourceIdMap;
 
   ResourceIdToDeviceIdMap device_ids_;
   DeviceIdToResourceIdMap resource_ids_;
 
+  scoped_refptr<base::MessageLoopProxy> ui_message_loop_;
+
   DISALLOW_COPY_AND_ASSIGN(HidDeviceManager);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_HID_HID_DEVICE_MANAGER_H_