Define WEBRTC_CHROMIUM_BUILD in libjingle.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 13 matching lines @@
       'GTEST_RELATIVE_PATH',
       'HAVE_SRTP',
       'HAVE_WEBRTC_VIDEO',
       'HAVE_WEBRTC_VOICE',
       'LOGGING_INSIDE_WEBRTC',
       'NO_MAIN_THREAD_WRAPPING',
       'NO_SOUND_SYSTEM',
       'SRTP_RELATIVE_PATH',
       'USE_WEBRTC_DEV_BRANCH',
       'ENABLE_EXTERNAL_AUTH',
+      'WEBRTC_CHROMIUM_BUILD',
     ],
     'configurations': {
       'Debug': {
         'defines': [
           # TODO(sergeyu): Fix libjingle to use NDEBUG instead of
           # _DEBUG and remove this define. See below as well.
           '_DEBUG',
         ],
       }
     },
@@ skipping 613 matching lines @@
               # in this directory and not lib.target as will otherwise be
               # the case with make builds.
               'product_dir': '<(PRODUCT_DIR)/lib',
             }],
           ],
         },  # target libpeerconnection
       ],
     }],
   ],
 }