Enter VR button not appearing anymore (Oculus browser), impossible to enter VR

[weddingdj]

Description:

• A-Frame Version: latest master
• Platform / Device: Gear VR, Oculus browser
• Reproducible Code Snippet or URL: http://aframe-master.glitch.me/

This regression happened after fixing #2614
The enter VR button briefly appears, then disappears.

[dmarcos]

A PR to fix this landend last night: #2751

Can you make sure you're using the very latest master?

[ngokevin]

The issue is different and mentions that pr

[machenmusik]

Can someone try #2707 and see if it is the old Carmel auto-enter attempt?

[weddingdj]

@dmarcos http://aframe-master.glitch.me/ uses the master which a-frobot commited just after #2751 has been commited (https://github.com/aframevr/aframe/commits/master).