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

content/browser/renderer_host/media/media_stream_device_settings.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/browser/renderer_host/media/media_stream_device_settings.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 116 matching lines @@
   if (!host || !host->GetDelegate()) {
     callback.Run(content::MediaStreamDevices());
     return;
   }
 
   host->GetDelegate()->RequestMediaAccessPermission(&request, callback);
 }
 
 bool IsRequestReadyForView(
     media_stream::MediaStreamDeviceSettingsRequest* request) {
-  if ((request->options.audio && request->devices_full.count(
-          content::MEDIA_STREAM_DEVICE_TYPE_AUDIO_CAPTURE) == 0) ||
-      (request->options.video && request->devices_full.count(
-          content::MEDIA_STREAM_DEVICE_TYPE_VIDEO_CAPTURE) == 0)) {
+  if ((content::IsAudioMediaType(request->options.audio_type) &&
+       request->devices_full.count(request->options.audio_type) == 0) ||
+      (content::IsVideoMediaType(request->options.video_type) &&
+       request->devices_full.count(request->options.video_type) == 0)) {
     return false;
   }
 
   // We have got all the requested devices, it is ready if it has not
   // been posted for UI yet.
   return !request->posted_task;
 }
 
 }  // namespace
 
@@ skipping 211 matching lines @@
     }
   }
 
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&MediaStreamDeviceSettings::PostResponse,
                  weak_ptr_factory_.GetWeakPtr(), label, devices_to_use));
 }
 
 }  // namespace media_stream