Create new class "CastTransport", which encapsulates the message read and write event loops.

extensions/extensions.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 336 matching lines @@
         'browser/api/cast_channel/cast_auth_util.cc',
         'browser/api/cast_channel/cast_auth_util.h',
         'browser/api/cast_channel/cast_channel_api.cc',
         'browser/api/cast_channel/cast_channel_api.h',
         'browser/api/cast_channel/cast_framer.cc',
         'browser/api/cast_channel/cast_framer.h',
         'browser/api/cast_channel/cast_message_util.cc',
         'browser/api/cast_channel/cast_message_util.h',
         'browser/api/cast_channel/cast_socket.cc',
         'browser/api/cast_channel/cast_socket.h',
+        'browser/api/cast_channel/cast_framer.cc',
+        'browser/api/cast_channel/cast_framer.h',
+        'browser/api/cast_channel/cast_transport.h',
+        'browser/api/cast_channel/cast_transport.cc',
         'browser/api/cast_channel/logger.cc',
         'browser/api/cast_channel/logger.h',
         'browser/api/cast_channel/logger_util.cc',
         'browser/api/cast_channel/logger_util.h',
         'browser/api/declarative/deduping_factory.h',
         'browser/api/declarative/declarative_api.cc',
         'browser/api/declarative/declarative_api.h',
         'browser/api/declarative/declarative_rule.h',
         'browser/api/declarative/rules_cache_delegate.cc',
         'browser/api/declarative/rules_cache_delegate.h',
@@ skipping 660 matching lines @@
       # Needed for third_party libraries like leveldb.
       'include_dirs': [
         '..',
       ],
       'sources': [
         'browser/api/api_resource_manager_unittest.cc',
         'browser/api/bluetooth/bluetooth_event_router_unittest.cc',
         'browser/api/cast_channel/cast_channel_api_unittest.cc',
         'browser/api/cast_channel/cast_framer_unittest.cc',
         'browser/api/cast_channel/cast_socket_unittest.cc',
+        'browser/api/cast_channel/cast_transport_unittest.cc',
         'browser/api/cast_channel/logger_unittest.cc',
         'browser/api/declarative/declarative_rule_unittest.cc',
         'browser/api/declarative/deduping_factory_unittest.cc',
         'browser/api/power/power_api_unittest.cc',
         'browser/api/sockets_tcp/sockets_tcp_api_unittest.cc',
         'browser/api/storage/settings_quota_unittest.cc',
         'browser/api/storage/storage_api_unittest.cc',
         'browser/api/storage/storage_frontend_unittest.cc',
         'browser/app_window/app_window_geometry_cache_unittest.cc',
         'browser/computed_hashes_unittest.cc',
@@ skipping 77 matching lines @@
           'browser/api/cast_channel/logging.proto'
       ],
       'variables': {
           'proto_in_dir': 'browser/api/cast_channel',
           'proto_out_dir': 'extensions/browser/api/cast_channel',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ]
 }