Adding files to libjingle .gn/.gyp.

third_party/libjingle/libjingle.gyp

 # Copyright (c) 2012 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.
 
 {
   'includes': [
     '../../build/win_precompile.gypi',
   ],
   'variables': {
     'enabled_libjingle_device_manager%': 0,
@@ skipping 262 matching lines @@
             '<(libjingle_source)/talk/app/webrtc/localaudiosource.h',
             '<(libjingle_source)/talk/app/webrtc/mediaconstraintsinterface.cc',
             '<(libjingle_source)/talk/app/webrtc/mediaconstraintsinterface.h',
             '<(libjingle_source)/talk/app/webrtc/mediacontroller.cc',
             '<(libjingle_source)/talk/app/webrtc/mediacontroller.h',
             '<(libjingle_source)/talk/app/webrtc/mediastream.cc',
             '<(libjingle_source)/talk/app/webrtc/mediastream.h',
             '<(libjingle_source)/talk/app/webrtc/mediastreamhandler.cc',
             '<(libjingle_source)/talk/app/webrtc/mediastreamhandler.h',
             '<(libjingle_source)/talk/app/webrtc/mediastreaminterface.h',
+            '<(libjingle_source)/talk/app/webrtc/mediastreamobserver.cc',
+            '<(libjingle_source)/talk/app/webrtc/mediastreamobserver.h',
             '<(libjingle_source)/talk/app/webrtc/mediastreamprovider.h',
             '<(libjingle_source)/talk/app/webrtc/mediastreamproxy.h',
             '<(libjingle_source)/talk/app/webrtc/mediastreamtrack.h',
             '<(libjingle_source)/talk/app/webrtc/mediastreamtrackproxy.h',
             '<(libjingle_source)/talk/app/webrtc/notifier.h',
             '<(libjingle_source)/talk/app/webrtc/peerconnection.cc',
             '<(libjingle_source)/talk/app/webrtc/peerconnection.h',
             '<(libjingle_source)/talk/app/webrtc/peerconnectionfactory.cc',
             '<(libjingle_source)/talk/app/webrtc/peerconnectionfactory.h',
             '<(libjingle_source)/talk/app/webrtc/peerconnectioninterface.h',
@@ skipping 203 matching lines @@
           'conditions': [
             ['OS=="android"', {
               'standalone_static_library': 1,
             }],
           ],
         },  # target libpeerconnection
       ],
     }],
   ],
 }