Remove BrowserThread dependency from usb_service.

chrome/chrome_browser.gypi

 # Copyright 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.
 
 {
   'variables': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 228 matching lines @@
       'browser/chrome_browser_main_android.h',
       'browser/chrome_browser_main_extra_parts.h',
       'browser/chrome_browser_main_linux.cc',
       'browser/chrome_browser_main_linux.h',
       'browser/chrome_browser_main_mac.h',
       'browser/chrome_browser_main_mac.mm',
       'browser/chrome_browser_main_win.cc',
       'browser/chrome_browser_main_win.h',
       'browser/chrome_browser_metrics_service_observer.cc',
       'browser/chrome_browser_metrics_service_observer.h',
+      'browser/chrome_device_client.cc',
+      'browser/chrome_device_client.h',
       'browser/chrome_content_browser_client.cc',
       'browser/chrome_content_browser_client.h',
       'browser/chrome_content_browser_client_parts.h',
       'browser/chrome_elf_init_win.cc',
       'browser/chrome_elf_init_win.h',
       'browser/chrome_notification_types.h',
       'browser/chrome_page_zoom.cc',
       'browser/chrome_page_zoom.h',
       'browser/chrome_page_zoom_constants.cc',
       'browser/chrome_page_zoom_constants.h',
@@ skipping 2664 matching lines @@
             '../components/components.gyp:precache_content',
             '../components/components.gyp:sessions',
             '../components/components.gyp:storage_monitor',
             '../components/components.gyp:translate_content_browser',
             '../components/components.gyp:url_matcher',
             '../components/components.gyp:usb_service',
             '../components/components.gyp:visitedlink_browser',
             '../components/components.gyp:visitedlink_common',
             '../components/components.gyp:web_modal',
             '../content/app/resources/content_resources.gyp:content_resources',
+            '../device/common/common.gyp:device_common',
             '../media/cast/cast.gyp:cast_net',
             '../media/media.gyp:media',
             '../mojo/mojo_base.gyp:mojo_common_lib',
             '../mojo/mojo_base.gyp:mojo_cpp_bindings',
             '../mojo/mojo_base.gyp:mojo_environment_chromium',
             '../mojo/mojo_base.gyp:mojo_js_bindings',
             '../mojo/mojo_base.gyp:mojo_system_impl',
             '../net/net.gyp:net_with_v8',
             # TODO(tonyg): Remove this dependency (crbug.com/280157).
             '../testing/perf/perf_test.gyp:*',
@@ skipping 634 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }