Fix sys tray baloon shown when extensions use getMediaStream().

chrome/browser/media/media_stream_capture_indicator.cc

Index: chrome/browser/media/media_stream_capture_indicator.cc
diff --git a/chrome/browser/media/media_stream_capture_indicator.cc b/chrome/browser/media/media_stream_capture_indicator.cc
index fe582577b7cd8ada7c3bd0bce0c7e2e5e98ea57a..ea2298467be2bebe588ebc80b9c769ba44f221b5 100644
--- a/chrome/browser/media/media_stream_capture_indicator.cc
+++ b/chrome/browser/media/media_stream_capture_indicator.cc
@@ -171,8 +171,10 @@ int MediaStreamCaptureIndicator::WebContentsDeviceUsage::AddDevices(
       stop_screen_capture_callback_ = close_callback;
     } else if (content::IsAudioMediaType(it->type)) {
       ++audio_ref_count_;
+      incremented_audio_count = true;
     } else if (content::IsVideoMediaType(it->type)) {
       ++video_ref_count_;
+      incremented_video_count = true;
     } else {
       NOTIMPLEMENTED();
     }