Remove the dependency of TransportChannel and TransportChannelImpl.

webrtc/p2p/BUILD.gn

 # Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("../build/webrtc.gni")
 
@@ skipping 11 matching lines @@
 rtc_static_library("rtc_p2p") {
   sources = [
     "base/asyncstuntcpsocket.cc",
     "base/asyncstuntcpsocket.h",
     "base/basicpacketsocketfactory.cc",
     "base/basicpacketsocketfactory.h",
     "base/candidate.h",
     "base/common.h",
     "base/dtlstransportchannel.cc",
     "base/dtlstransportchannel.h",
+    "base/dtlstransportinternal.h",
     "base/icetransportinternal.h",
     "base/jseptransport.cc",
     "base/jseptransport.h",
     "base/p2pconstants.cc",
     "base/p2pconstants.h",
     "base/p2ptransportchannel.cc",
     "base/p2ptransportchannel.h",
     "base/packetsocketfactory.h",
     "base/packettransportinterface.h",
     "base/port.cc",
@@ skipping 107 matching lines @@
     # Suppress warnings from Chrome's Clang plugins.
     # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
     suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
   }
 
   deps = [
     "..:webrtc_common",
     "../base:rtc_base",
   ]
 }