Biao, could you please take a look at this?

Note that this happens on Daydream headsets when you autopresent WebVR using NFC (Placing the device in the headset).

 Issue 797359  has been merged into this issue.

just checked on both TOT and beta (64.0.3282.29), can't reproduce the problem following steps in bug report. so mark as wont fix.

Hey Brian, still repros for me. It only happens when you autopresent using NFC though. Which I didn't include that detail in the original repro steps.

Were you using NFC to autopresent?

My mistake, I see now how following the repro steps listed here would not repro the issue. However, this issue was always only triggered by NFC, I just wrote the steps down incorrectly. I should have been more clear when I noted this in comment #4 and adjusted the title earlier.

I see, in that case, I agree it is the same as 797359. Sorry I won't be able to work on this because of vacation. Could anyone (mthiesse, ymalik, vollic?) help with this? I think it is probably because of this line: https://cs.chromium.org/chromium/src/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java?rcl=0a8f633e910ca85f4fc5ff4cf1f8cecca481e30c&l=1083

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7a64fa42500c74c5f38f1f2f0deafe8c3c1887d0

commit 7a64fa42500c74c5f38f1f2f0deafe8c3c1887d0
Author: Michael Thiessen <mthiesse@chromium.org>
Date: Thu Jan 18 00:03:58 2018

VR: Don't show "press App button" toast with VR browsing disabled

Bug:  781056 
Change-Id: I0bbd61d071ea50293b4600d61cb657bd42eadd12
Reviewed-on: https://chromium-review.googlesource.com/871801
Reviewed-by: Christopher Grant <cjgrant@chromium.org>
Commit-Queue: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#529958}
[modify] https://crrev.com/7a64fa42500c74c5f38f1f2f0deafe8c3c1887d0/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShell.java
[modify] https://crrev.com/7a64fa42500c74c5f38f1f2f0deafe8c3c1887d0/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrShellDelegate.java

Hi Michael, the issue here is whether or not the toast should appear when a user does the following:

1. in 2D, goes to https://webvr.info/samples/03-vr-presentation.html
2. Places the phone in the Daydream headset
3. The WebVR presentation is auto-presented via NFC
4. Current behavior is that the toast appears in this case. 

Also, I noticed that the toast now appears even if the user presses the Enter VR button in step 2. This was not the case before. M63. So Is the expected behavior now to show this toast in both cases?

Ah, actually, closing this as fixed and verified, since it fixes the cardboard mode case. (not showing toast)