diff --git a/brightray/browser/media/media_capture_devices_dispatcher.cc b/brightray/browser/media/media_capture_devices_dispatcher.cc
index 65ea4b94be..e38770024d 100644
--- a/brightray/browser/media/media_capture_devices_dispatcher.cc
+++ b/brightray/browser/media/media_capture_devices_dispatcher.cc
@@ -159,7 +159,6 @@ void MediaCaptureDevicesDispatcher::OnAudioStreamStopped(
 void MediaCaptureDevicesDispatcher::OnCreatingAudioStream(
     int render_process_id,
     int render_view_id) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 }
 
 }  // namespace brightray
diff --git a/brightray/browser/media/media_stream_devices_controller.cc b/brightray/browser/media/media_stream_devices_controller.cc
index fc867f075b..b55e73844f 100644
--- a/brightray/browser/media/media_stream_devices_controller.cc
+++ b/brightray/browser/media/media_stream_devices_controller.cc
@@ -189,11 +189,12 @@ void MediaStreamDevicesController::HandleUserMediaRequest() {
                                    screen_id.ToString(), "Screen"));
   }
 
-  callback_.Run(
-      devices,
-      devices.empty() ? content::MEDIA_DEVICE_INVALID_STATE :
-                        content::MEDIA_DEVICE_OK,
-      scoped_ptr<content::MediaStreamUI>());
+  content::MediaResponseCallback cb = callback_;
+  callback_.Reset();
+  cb.Run(devices,
+         devices.empty() ? content::MEDIA_DEVICE_INVALID_STATE :
+                           content::MEDIA_DEVICE_OK,
+         scoped_ptr<content::MediaStreamUI>());
 }
 
 }  // namespace brightray