Begin adding support for tab mirroring via the MediaStream audio/video capturing

content/public/common/media_stream_request.cc

 // 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.
 
 #include "content/public/common/media_stream_request.h"
 
 namespace content {
 
+bool IsAudioMediaType(MediaStreamDeviceType type) {
+  return (type == content::MEDIA_DEVICE_AUDIO_CAPTURE ||
+          type == content::MEDIA_TAB_AUDIO_CAPTURE);
+}
+
+bool IsVideoMediaType(MediaStreamDeviceType type) {
+  return (type == content::MEDIA_DEVICE_VIDEO_CAPTURE ||
+          type == content::MEDIA_TAB_VIDEO_CAPTURE);
+}
+
 MediaStreamDevice::MediaStreamDevice(
     MediaStreamDeviceType type,
     const std::string& device_id,
     const std::string& name)
     : type(type),
       device_id(device_id),
       name(name) {
 }
 
 MediaStreamDevice::~MediaStreamDevice() {}
@@ skipping 10 matching lines @@
 MediaStreamRequest::~MediaStreamRequest() {
   for (MediaStreamDeviceMap::iterator iter = devices.begin();
        iter != devices.end();
        ++iter) {
     iter->second.clear();
   }
   devices.clear();
 }
 
 }  // namespace content