don't build IpcNetworkManager unit tests in non-webrtc builds

content/content_tests.gypi

 # Copyright (c) 2013 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': {
     'layouttest_support_content_sources': [
       'public/test/layouttest_support.h',
       'public/test/nested_message_pump_android.cc',
       'public/test/nested_message_pump_android.h',
@@ skipping 692 matching lines @@
         'renderer/media/android/media_info_loader_unittest.cc',
         'renderer/media/audio_message_filter_unittest.cc',
         'renderer/media/audio_renderer_mixer_manager_unittest.cc',
         'renderer/media/crypto/key_systems_unittest.cc',
         'renderer/media/render_media_log_unittest.cc',
         'renderer/media/video_capture_impl_manager_unittest.cc',
         'renderer/media/video_capture_impl_unittest.cc',
         'renderer/media/video_capture_message_filter_unittest.cc',
         'renderer/media/webrtc/video_destination_handler_unittest.cc',
         'renderer/npapi/webplugin_impl_unittest.cc',
-        'renderer/p2p/ipc_network_manager_unittest.cc',
         'renderer/pepper/event_conversion_unittest.cc',
         'renderer/pepper/host_var_tracker_unittest.cc',
         'renderer/pepper/mock_resource.h',
         'renderer/pepper/pepper_broker_unittest.cc',
         'renderer/pepper/v8_var_converter_unittest.cc',
         'renderer/render_frame_impl_unittest.cc',
         'renderer/render_thread_impl_unittest.cc',
         'renderer/render_widget_unittest.cc',
         'renderer/screen_orientation/screen_orientation_dispatcher_unittest.cc',
         'renderer/skia_benchmarking_extension_unittest.cc',
@@ skipping 86 matching lines @@
             'renderer/media/webrtc/peer_connection_dependency_factory_unittest.cc',
             'renderer/media/webrtc/webrtc_local_audio_track_adapter_unittest.cc',
             'renderer/media/webrtc/webrtc_media_stream_adapter_unittest.cc',
             'renderer/media/webrtc/webrtc_video_capturer_adapter_unittest.cc',
             'renderer/media/webrtc_audio_capturer_unittest.cc',
             'renderer/media/webrtc_audio_renderer_unittest.cc',
             'renderer/media/webrtc_identity_service_unittest.cc',
             'renderer/media/webrtc_local_audio_source_provider_unittest.cc',
             'renderer/media/webrtc_local_audio_track_unittest.cc',
             'renderer/media/webrtc_uma_histograms_unittest.cc',
+            'renderer/p2p/ipc_network_manager_unittest.cc',
           ],
           'dependencies': [
             '../third_party/libjingle/libjingle.gyp:libjingle_webrtc',
             '../third_party/libjingle/libjingle.gyp:libpeerconnection',
             '../third_party/webrtc/modules/modules.gyp:video_capture_module',
           ]
         }, {
           'sources!': [
             'renderer/media/webrtc/video_destination_handler_unittest.cc',
           ],
@@ skipping 1059 matching lines @@
                   'files': ['<(PRODUCT_DIR)/libnpapi_test_plugin.so'],
                 },
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }