Decoupling audio_device from Obj-C code

webrtc/modules/audio_device/noop.cc

Index: webrtc/modules/audio_device/noop.cc
diff --git a/webrtc/modules/audio_device/noop.cc b/webrtc/modules/audio_device/noop.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6c857eaf8f1ebfc183291716fde6342c30cdd115
--- /dev/null
+++ b/webrtc/modules/audio_device/noop.cc
@@ -0,0 +1,12 @@
+/*
+ *  Copyright (c) 2017 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.
+ */
+
+// This is supposed to be empty because it is only needed as a workaround
+// to compile webrtc/rtc_base:rtc_base_approved.

[kjellander_webrtc, 2017/08/16 09:31:53]

The target here is wrong, right? Better make the comment generic and mention
it's needed to compile a rtc_static_library target, since I believe that's the
reason, right?