Let fake UI allow a video capture device to be opened several times.

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 85c634ed0d7d9489f5aaf7cacee8748f56ef7390..b1eb952657d4b539ece3761a36d8ab97f9be49d0 100644
--- a/content/browser/renderer_host/media/media_stream_device_settings.cc
+++ b/content/browser/renderer_host/media/media_stream_device_settings.cc
@@ -124,6 +124,16 @@ void MediaStreamDeviceSettings::AvailableDevices(
           }
         }
       }
+      if (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()));
+      }
+
       // Post result and delete request.
       requester_->DevicesAccepted(label, devices_to_use);
       requests_.erase(request_it);