Split webrtc/video into webrtc/{audio,call,video}.

webrtc/audio/webrtc_audio.gypi

+# Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS.  All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+{
+  'variables': {
+    'webrtc_audio_dependencies': [
+      '<(webrtc_root)/common.gyp:webrtc_common',
+      '<(webrtc_root)/system_wrappers/system_wrappers.gyp:system_wrappers',
+      '<(webrtc_root)/voice_engine/voice_engine.gyp:voice_engine',
+      '<(webrtc_root)/webrtc.gyp:rtc_event_log',
+    ],
+    'webrtc_audio_sources': [
+      'audio/audio_receive_stream.cc',
+      'audio/audio_receive_stream.h',
+    ],
+  },
+}