Add missing files to BUILD.gn

third_party/libjingle/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/crypto.gni")
 import("//build/config/features.gni")
 
 # From third_party/libjingle/libjingle.gyp's target_defaults.
 config("jingle_unexported_configs") {
   defines = [
@@ skipping 336 matching lines @@
   # as is supported in the GYP build. It's not clear what this is used for.
   source_set("libjingle_webrtc_common") {
     sources = [
       "overrides/talk/media/webrtc/webrtcexport.h",
       "source/talk/app/webrtc/audiotrack.cc",
       "source/talk/app/webrtc/audiotrack.h",
       "source/talk/app/webrtc/audiotrackrenderer.cc",
       "source/talk/app/webrtc/audiotrackrenderer.h",
       "source/talk/app/webrtc/datachannel.cc",
       "source/talk/app/webrtc/datachannel.h",
+      "source/talk/app/webrtc/dtlsidentityservice.cc",
+      "source/talk/app/webrtc/dtlsidentityservice.h",
+      "source/talk/app/webrtc/dtlsidentitystore.cc",
+      "source/talk/app/webrtc/dtlsidentitystore.h",
       "source/talk/app/webrtc/dtmfsender.cc",
       "source/talk/app/webrtc/dtmfsender.h",
       "source/talk/app/webrtc/jsep.h",
       "source/talk/app/webrtc/jsepicecandidate.cc",
       "source/talk/app/webrtc/jsepicecandidate.h",
       "source/talk/app/webrtc/jsepsessiondescription.cc",
       "source/talk/app/webrtc/jsepsessiondescription.h",
       "source/talk/app/webrtc/localaudiosource.cc",
       "source/talk/app/webrtc/localaudiosource.h",
       "source/talk/app/webrtc/mediaconstraintsinterface.cc",
@@ skipping 206 matching lines @@
         "source/talk/app/webrtc/java/src/org/webrtc/SessionDescription.java",
         "source/talk/app/webrtc/java/src/org/webrtc/VideoCapturer.java",
         "source/talk/app/webrtc/java/src/org/webrtc/VideoRenderer.java",
         "source/talk/app/webrtc/java/src/org/webrtc/VideoSource.java",
         "source/talk/app/webrtc/java/src/org/webrtc/VideoTrack.java",
       ]
     }
   }
 }  # enable_webrtc
 # TODO(GYP): Port libjingle.gyp's enable_webrtc condition block.