Remove BrowserThread dependency from usb_service.

chrome/browser/browser_process_impl.h

 // 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.
 
 // When each service is created, we set a flag indicating this. At this point,
 // the service initialization could fail or succeed. This allows us to remember
 // if we tried to create a service, and not try creating it over and over if
 // the creation failed.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_
 #define CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/debug/stack_trace.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/browser_process.h"
 
+class ChromeDeviceClient;
 class ChromeNetLog;
 class ChromeResourceDispatcherHostDelegate;
 class RemoteDebuggingServer;
 class PrefRegistrySimple;
 class PromoResourceService;
 
 #if defined(ENABLE_PLUGIN_INSTALLATION)
 class PluginsResourceService;
 #endif
 
@@ skipping 259 matching lines @@
 
 #if defined(ENABLE_WEBRTC)
   // Lazily initialized.
   scoped_ptr<WebRtcLogUploader> webrtc_log_uploader_;
 #endif
 
   scoped_ptr<network_time::NetworkTimeTracker> network_time_tracker_;
 
   scoped_ptr<gcm::GCMDriver> gcm_driver_;
 
+  scoped_ptr<ChromeDeviceClient> device_client_;
+
   DISALLOW_COPY_AND_ASSIGN(BrowserProcessImpl);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_