device: Restructure the layout of gyp files.

chrome/chrome_common.gypi

 # Copyright (c) 2013 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.
 
 {
   'targets': [
     {
       'target_name': 'common',
       'type': 'static_library',
       'variables': {
@@ skipping 423 matching lines @@
         'common/web_resource/web_resource_unpacker.h',
         'common/worker_thread_ticker.cc',
         'common/worker_thread_ticker.h',
       ],
       'conditions': [
         ['enable_extensions==1', {
           'sources!': [
             'common/extensions/api/extension_api_stub.cc',
           ],
           'dependencies': [
-            '../device/device.gyp:device_usb',
+            '../device/usb/usb.gyp:device_usb',
           ],
         }, {  # enable_extensions == 0
           'sources/': [
             ['exclude', '^common/extensions/api/'],
             ['include', 'common/extensions/api/extension_api_stub.cc'],
             ['include', 'common/extensions/api/extension_action/action_info.cc'],
             ['include', 'common/extensions/api/extension_action/action_info.h'],
             ['include', 'common/extensions/api/extension_action/browser_action_handler.cc'],
             ['include', 'common/extensions/api/extension_action/browser_action_handler.h'],
             ['include', 'common/extensions/api/extension_action/page_action_handler.cc'],
@@ skipping 308 matching lines @@
         'common/metrics/proto/user_action_event.proto',
       ],
       'variables': {
         'proto_in_dir': 'common/metrics/proto',
         'proto_out_dir': 'chrome/common/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ],
     },
   ],
 }