Add SdpHelper for more reliable codec configuration in WebrtcTransport.

remoting/protocol/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//media/media_options.gni")
 
 static_library("protocol") {
   sources = [
     "audio_decode_scheduler.cc",
@@ skipping 120 matching lines @@
     "port_allocator.h",
     "port_allocator_factory.h",
     "port_range.cc",
     "port_range.h",
     "pseudotcp_adapter.cc",
     "pseudotcp_adapter.h",
     "pseudotcp_channel_factory.cc",
     "pseudotcp_channel_factory.h",
     "rejecting_authenticator.cc",
     "rejecting_authenticator.h",
+    "sdp_message.cc",
+    "sdp_message.h",
     "secure_channel_factory.cc",
     "secure_channel_factory.h",
     "session.h",
     "session_config.cc",
     "session_config.h",
     "session_manager.h",
     "socket_util.cc",
     "socket_util.h",
     "spake2_authenticator.cc",
     "spake2_authenticator.h",
@@ skipping 161 matching lines @@
     "jingle_session_unittest.cc",
     "message_decoder_unittest.cc",
     "message_reader_unittest.cc",
     "monitored_video_stub_unittest.cc",
     "mouse_input_filter_unittest.cc",
     "negotiating_authenticator_unittest.cc",
     "pairing_registry_unittest.cc",
     "port_range_unittest.cc",
     "ppapi_module_stub.cc",
     "pseudotcp_adapter_unittest.cc",
+    "sdp_message_unittest.cc",
     "session_config_unittest.cc",
     "spake2_authenticator_unittest.cc",
     "ssl_hmac_channel_authenticator_unittest.cc",
     "third_party_authenticator_unittest.cc",
     "v2_authenticator_unittest.cc",
     "validating_authenticator_unittest.cc",
     "video_frame_pump_unittest.cc",
     "webrtc_audio_source_adapter_unittest.cc",
     "webrtc_frame_scheduler_unittest.cc",
     "webrtc_transport_unittest.cc",
   ]
 
   deps = [
     ":test_support",
     "//net:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }