Update webrtc to 2881 and libjingle to 202.

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,
   },
   'target_defaults': {
     'defines': [
       'EXPAT_RELATIVE_PATH',
       'FEATURE_ENABLE_SSL',
       'GTEST_RELATIVE_PATH',
       'HAVE_SRTP',
       'HAVE_WEBRTC_VIDEO',
       'HAVE_WEBRTC_VOICE',
       'JSONCPP_RELATIVE_PATH',
       'LOGGING_INSIDE_LIBJINGLE',
       'NO_MAIN_THREAD_WRAPPING',
       'NO_SOUND_SYSTEM',
       'SRTP_RELATIVE_PATH',
       '_USE_32BIT_TIME_T',
+      # TODO(ronghuawu): Remove this once libjingle is updated to use the new
+      # webrtc.
+      'USE_WEBRTC_DEV_BRANCH',
     ],
     'configurations': {
       'Debug': {
         'defines': [
           # TODO(sergeyu): Fix libjingle to use NDEBUG instead of
           # _DEBUG and remove this define. See below as well.
           '_DEBUG',
         ],
       }
     },
@@ skipping 670 matching lines @@
       ],
       'include_dirs': [
         'source',
       ],
       'dependencies': [
         'libjingle',
       ],
     }, # target peerconnection_server
   ],
 }