Make protocol::ConnectionToClient an abstract interface.

remoting/remoting_test.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': [
     {
       # GN version: //remoting:test_support
       'target_name': 'remoting_test_support',
       'type': 'static_library',
@@ skipping 293 matching lines @@
         'protocol/authenticator_test_base.cc',
         'protocol/authenticator_test_base.h',
         'protocol/channel_multiplexer_unittest.cc',
         'protocol/channel_socket_adapter_unittest.cc',
         'protocol/chromium_socket_factory_unittest.cc',
         'protocol/client_video_dispatcher_unittest.cc',
         'protocol/clipboard_echo_filter_unittest.cc',
         'protocol/clipboard_filter_unittest.cc',
         'protocol/connection_tester.cc',
         'protocol/connection_tester.h',
-        'protocol/connection_to_client_unittest.cc',
         'protocol/content_description_unittest.cc',
+        'protocol/ice_connection_to_client_unittest.cc',
         'protocol/input_event_tracker_unittest.cc',
         'protocol/input_filter_unittest.cc',
         'protocol/jingle_messages_unittest.cc',
         'protocol/jingle_session_unittest.cc',
         'protocol/message_decoder_unittest.cc',
         'protocol/message_reader_unittest.cc',
         'protocol/monitored_video_stub_unittest.cc',
         'protocol/mouse_input_filter_unittest.cc',
-        'protocol/quic_channel_factory_unittest.cc',
         'protocol/negotiating_authenticator_unittest.cc',
         'protocol/pairing_registry_unittest.cc',
         'protocol/port_range_unittest.cc',
         'protocol/ppapi_module_stub.cc',
         'protocol/pseudotcp_adapter_unittest.cc',
+        'protocol/quic_channel_factory_unittest.cc',
         'protocol/ssl_hmac_channel_authenticator_unittest.cc',
         'protocol/third_party_authenticator_unittest.cc',
         'protocol/v2_authenticator_unittest.cc',
         'signaling/iq_sender_unittest.cc',
         'signaling/jid_util_unittest.cc',
         'signaling/log_to_server_unittest.cc',
         'signaling/push_notification_subscriber_unittest.cc',
         'signaling/server_log_entry_unittest.cc',
         'signaling/server_log_entry_unittest.h',
         'signaling/xmpp_login_handler_unittest.cc',
+        'signaling/xmpp_signal_strategy_unittest.cc',
         'signaling/xmpp_stream_parser_unittest.cc',
-        'signaling/xmpp_signal_strategy_unittest.cc',
         'test/access_token_fetcher_unittest.cc',
         'test/app_remoting_report_issue_request_unittest.cc',
         'test/app_remoting_test_driver_environment_unittest.cc',
         'test/chromoting_test_driver_environment_unittest.cc',
         'test/connection_time_observer_unittest.cc',
         'test/host_list_fetcher_unittest.cc',
         'test/remote_host_info_fetcher_unittest.cc',
         'test/test_chromoting_client_unittest.cc',
         'test/test_video_renderer_unittest.cc',
       ],
@@ skipping 262 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'remoting_unittests.isolate',
           ],
         },
       ],
     }],
   ] # end of 'conditions'
 }