Add a basic Mojo SerialService that implements GetDevices().

device/serial/serial.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 10 matching lines @@
           ],
         }],
       ],
       'variables': {
         'mojom_base_output_dir': 'device/serial',
       },
       'includes': [
         '../../mojo/public/tools/bindings/mojom_bindings_generator.gypi',
       ],
       'dependencies': [
+        '../../mojo/mojo.gyp:mojo_cpp_bindings',
         '../../net/net.gyp:net',
       ],
+      'export_dependent_settings': [
+        '../../mojo/mojo.gyp:mojo_cpp_bindings',
+      ],
       'sources': [
         'serial.mojom',
         'serial_device_enumerator.cc',
         'serial_device_enumerator.h',
         'serial_device_enumerator_linux.cc',
         'serial_device_enumerator_linux.h',
         'serial_device_enumerator_mac.cc',
         'serial_device_enumerator_mac.h',
         'serial_device_enumerator_win.cc',
         'serial_device_enumerator_win.h',
         'serial_io_handler.cc',
         'serial_io_handler.h',
         'serial_io_handler_posix.cc',
         'serial_io_handler_posix.h',
         'serial_io_handler_win.cc',
         'serial_io_handler_win.h',
+        'serial_service_impl.cc',
+        'serial_service_impl.h',
       ],
     },
   ],
 }