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 343 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 691 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/declarative/rules_registry_unittest.cc',
         'browser/api/declarative_webrequest/webrequest_condition_unittest.cc',
         'browser/api/declarative_webrequest/webrequest_condition_attribute_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',
@@ skipping 79 matching lines @@
       'conditions': [
         ['OS=="win" and win_use_allocator_shim==1', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
         }],
       ],
     },
   ]
 }