Add ProtoDecoder for sending messages between Host and Controller when pairing

components/pairing.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'pairing',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
       'dependencies': [
         'pairing_api_proto',
         '../base/base.gyp:base',
         '../device/bluetooth/bluetooth.gyp:device_bluetooth',
         '../net/net.gyp:net',
       ],
       'sources': [
         'pairing/controller_pairing_controller.cc',
         'pairing/controller_pairing_controller.h',
         'pairing/fake_controller_pairing_controller.cc',
         'pairing/fake_controller_pairing_controller.h',
         'pairing/fake_host_pairing_controller.cc',
         'pairing/fake_host_pairing_controller.h',
         'pairing/host_pairing_controller.cc',
         'pairing/host_pairing_controller.h',
         'pairing/message_buffer.cc',
         'pairing/message_buffer.h',
+        'pairing/proto_decoder.cc',
+        'pairing/proto_decoder.h',
       ],
     },
     {
       # Protobuf compiler / generator for the pairing api protocol buffer.
       'target_name': 'pairing_api_proto',
       'type': 'static_library',
       'sources': [ 'pairing/pairing_api.proto' ],
       'variables': {
         'proto_in_dir': 'pairing',
         'proto_out_dir': 'components/pairing',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }