MediaStream audio sourcing: Bypass audio processing for non-WebRTC cases.

content/public/common/media_stream_request.cc

Index: content/public/common/media_stream_request.cc
diff --git a/content/public/common/media_stream_request.cc b/content/public/common/media_stream_request.cc
index 72a4b160ef442d28213807f1dabfc303209424a6..d6626f19be345c14962c2bc08b547d32a8f3dc1f 100644
--- a/content/public/common/media_stream_request.cc
+++ b/content/public/common/media_stream_request.cc
@@ -21,6 +21,13 @@ bool IsVideoMediaType(MediaStreamType type) {
           type == content::MEDIA_DESKTOP_VIDEO_CAPTURE);
 }
 
+bool IsContentCaptureMediaType(MediaStreamType type) {
+  return (type == content::MEDIA_TAB_AUDIO_CAPTURE ||
+          type == content::MEDIA_TAB_VIDEO_CAPTURE ||
+          type == content::MEDIA_DESKTOP_AUDIO_CAPTURE ||
+          type == content::MEDIA_DESKTOP_VIDEO_CAPTURE);
+}
+
 MediaStreamDevice::MediaStreamDevice()
     : type(MEDIA_NO_SERVICE),
       video_facing(MEDIA_VIDEO_FACING_NONE) {