Add a partial Mojo serial connection interface and implementation.

chrome/chrome_tests.gypi

 # Copyright 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.
 {
   'includes': [
     'js_unittest_vars.gypi',
   ],
   'targets': [
     {
       'target_name': 'interactive_ui_tests',
@@ skipping 776 matching lines @@
         '../base/base.gyp:test_support_base',
         '../components/components.gyp:autofill_content_risk_proto',
         '../components/components.gyp:autofill_content_test_support',
         '../components/components.gyp:captive_portal_test_support',
         '../components/components.gyp:dom_distiller_content',
         '../components/components.gyp:dom_distiller_test_support',
         '../components/components.gyp:translate_core_common',
         '../components/components_resources.gyp:components_resources',
         '../components/components_strings.gyp:components_strings',
         '../device/bluetooth/bluetooth.gyp:device_bluetooth_mocks',
+        '../device/serial/serial.gyp:device_serial_test_util',
         '../extensions/common/api/api.gyp:extensions_api',
         '../google_apis/google_apis.gyp:google_apis_test_support',
         '../media/cast/cast.gyp:cast_test_utility',
         '../media/media.gyp:media',
         '../net/net.gyp:net',
         '../net/net.gyp:net_test_support',
         '../skia/skia.gyp:skia',
         '../sync/sync.gyp:sync',
         '../sync/sync.gyp:test_support_sync_api',
         '../testing/gmock.gyp:gmock',
@@ skipping 2177 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }