Added size check for MediaStreamDeviceSettings fake UI.

content/browser/renderer_host/media/media_stream_device_settings.cc

Index: content/browser/renderer_host/media/media_stream_device_settings.cc
diff --git a/content/browser/renderer_host/media/media_stream_device_settings.cc b/content/browser/renderer_host/media/media_stream_device_settings.cc
index b1eb952657d4b539ece3761a36d8ab97f9be49d0..433f3c24a4c5b3dd98333025ebecbf99fd764589 100644
--- a/content/browser/renderer_host/media/media_stream_device_settings.cc
+++ b/content/browser/renderer_host/media/media_stream_device_settings.cc
@@ -124,12 +124,12 @@ void MediaStreamDeviceSettings::AvailableDevices(
           }
         }
       }
-      if (num_media_requests != devices_to_use.size()) {
+      if (!request->devices[kVideoCapture].empty() &&
+          num_media_requests != devices_to_use.size()) {
         // Not all requested device types were opened. This happens if all
         // video capture devices are already opened, |in_use| isn't set for
         // audio devices. Allow the first video capture device in the list to be
         // opened for this user too.
-        DCHECK_NE(request->options.video_option, StreamOptions::kNoCamera);
         StreamDeviceInfoArray device_array = (request->devices[kVideoCapture]);
         devices_to_use.push_back(*(device_array.begin()));
       }