Build jingle targets when webrtc is enabled.

jingle/jingle.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.
 
 {
   'variables': {
     'chromium_code': 1,
   },  # variables
   'conditions': [
-    ['OS != "ios" and OS != "android"', {
+    ['enable_webrtc==1 or (OS != "ios" and OS != "android")', {
       'targets': [
         # A library of various utils for integration with libjingle.
         {
           'target_name': 'jingle_glue',
           'type': 'static_library',
           'sources': [
             'glue/channel_socket_adapter.cc',
             'glue/channel_socket_adapter.h',
             'glue/chrome_async_socket.cc',
             'glue/chrome_async_socket.h',
@@ skipping 186 matching lines @@
             '../base/base.gyp:base',
             '../base/base.gyp:test_support_base',
             '../net/net.gyp:net',
             '../net/net.gyp:net_test_support',
             '../testing/gmock.gyp:gmock',
             '../testing/gtest.gyp:gtest',
             '../third_party/libjingle/libjingle.gyp:libjingle',
           ],
         },
       ],
-    }, {  # OS == "ios" or OS == "android"
+    }, {  # enable_webrtc != 1 and (OS == "ios" or OS == "android")
       'targets': [
-        # Stub targets as iOS/Android don't use libjingle.
+        # Stub targets as iOS/Android don't use libjingle when webrtc is disabled.
         {
           'target_name': 'jingle_glue',
           'type': 'none',
         },
         {
           'target_name': 'jingle_glue_test_util',
           'type': 'none',
         },
         {
           'target_name': 'notifier',
@@ skipping 12 matching lines @@
           ],
         },
         {
           'target_name': 'notifier_test_util',
           'type': 'none',
         },
       ],
     }],
   ],
 }