Make PermissionRequest::GetIconId return different types

chrome/browser/media/webrtc/media_stream_capture_indicator.cc

Index: chrome/browser/media/webrtc/media_stream_capture_indicator.cc
diff --git a/chrome/browser/media/webrtc/media_stream_capture_indicator.cc b/chrome/browser/media/webrtc/media_stream_capture_indicator.cc
index 9e809839325b0fcb0e652f6b27f5d86bd981edcf..d97d9c6961d58703d6b3b99d5f4ee75311e5e980 100644
--- a/chrome/browser/media/webrtc/media_stream_capture_indicator.cc
+++ b/chrome/browser/media/webrtc/media_stream_capture_indicator.cc
@@ -356,6 +356,7 @@ void MediaStreamCaptureIndicator::MaybeCreateStatusTrayIcon(bool audio,
 void MediaStreamCaptureIndicator::EnsureStatusTrayIconResources() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
+  // TODO(estade): these should use vector icons.

[Peter Kasting, 2016/10/06 07:10:29]

Nit: crbug.com/505953?  Or is there another one?

[Evan Stade, 2016/10/06 15:33:50]

there is not another one filed. Dunno if you wanted me to link to that one, but
it doesn't seem all that useful (easy enough to find resources that still need
removing by looking in chrome/app/theme)

   if (!mic_image_) {
     mic_image_ = ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
         IDR_INFOBAR_MEDIA_STREAM_MIC);