Should we also port this back to M58?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/bcba8c8b526a9476f40f3830b3daabac7812bbcc

commit bcba8c8b526a9476f40f3830b3daabac7812bbcc
Author: mthiesse <mthiesse@chromium.org>
Date: Tue Mar 14 19:54:01 2017

Remove gesture token from vrdisplayactivate

Adds a specific exception to the user gesture requirement for presentation when presenting during a vrdisplayactivate event, and removes the generic user gesture from vrdisplayactivate.

BUG= 701429 

Review-Url: https://codereview.chromium.org/2751753003
Cr-Commit-Position: refs/heads/master@{#456797}

[modify] https://crrev.com/bcba8c8b526a9476f40f3830b3daabac7812bbcc/third_party/WebKit/Source/modules/vr/NavigatorVR.cpp
[modify] https://crrev.com/bcba8c8b526a9476f40f3830b3daabac7812bbcc/third_party/WebKit/Source/modules/vr/NavigatorVR.h
[modify] https://crrev.com/bcba8c8b526a9476f40f3830b3daabac7812bbcc/third_party/WebKit/Source/modules/vr/VRDisplay.cpp
[modify] https://crrev.com/bcba8c8b526a9476f40f3830b3daabac7812bbcc/third_party/WebKit/Source/modules/vr/VRDisplay.h

Your change meets the bar and is auto-approved for M58. Please go ahead and merge the CL to branch 3029 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), bhthompson@(ChromeOS), govind@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/57bfb0bcbbc513726876f0bb55692d168aa662bc

commit 57bfb0bcbbc513726876f0bb55692d168aa662bc
Author: Michael Thiessen <mthiesse@chromium.org>
Date: Thu Mar 16 18:39:50 2017

Remove gesture token from vrdisplayactivate

Adds a specific exception to the user gesture requirement for presentation when presenting during a vrdisplayactivate event, and removes the generic user gesture from vrdisplayactivate.

BUG= 701429 

Review-Url: https://codereview.chromium.org/2751753003
Cr-Commit-Position: refs/heads/master@{#456797}
(cherry picked from commit bcba8c8b526a9476f40f3830b3daabac7812bbcc)

Review-Url: https://codereview.chromium.org/2754133002 .
Cr-Commit-Position: refs/branch-heads/3029@{#246}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}

[modify] https://crrev.com/57bfb0bcbbc513726876f0bb55692d168aa662bc/third_party/WebKit/Source/modules/vr/NavigatorVR.cpp
[modify] https://crrev.com/57bfb0bcbbc513726876f0bb55692d168aa662bc/third_party/WebKit/Source/modules/vr/NavigatorVR.h
[modify] https://crrev.com/57bfb0bcbbc513726876f0bb55692d168aa662bc/third_party/WebKit/Source/modules/vr/VRDisplay.cpp
[modify] https://crrev.com/57bfb0bcbbc513726876f0bb55692d168aa662bc/third_party/WebKit/Source/modules/vr/VRDisplay.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/cf7253a19d61e880f964233caec61b4df6fab647

commit cf7253a19d61e880f964233caec61b4df6fab647
Author: mthiesse <mthiesse@chromium.org>
Date: Thu Mar 16 21:57:49 2017

Revert of Remove gesture token from vrdisplayactivate (patchset #1 id:1 of https://codereview.chromium.org/2754133002/ )

Reason for revert:
Fails to compile on M58 due to removing a header that was still used.

Original issue's description:
> Remove gesture token from vrdisplayactivate
>
> Adds a specific exception to the user gesture requirement for presentation when presenting during a vrdisplayactivate event, and removes the generic user gesture from vrdisplayactivate.
>
> BUG= 701429 
>
> Review-Url: https://codereview.chromium.org/2751753003
> Cr-Commit-Position: refs/heads/master@{#456797}
> (cherry picked from commit bcba8c8b526a9476f40f3830b3daabac7812bbcc)
>
> Review-Url: https://codereview.chromium.org/2754133002 .
> Cr-Commit-Position: refs/branch-heads/3029@{#246}
> Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
> Committed: https://chromium.googlesource.com/chromium/src/+/57bfb0bcbbc513726876f0bb55692d168aa662bc

TBR=
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG= 701429 

Review-Url: https://codereview.chromium.org/2756033002
Cr-Commit-Position: refs/branch-heads/3029@{#248}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}

[modify] https://crrev.com/cf7253a19d61e880f964233caec61b4df6fab647/third_party/WebKit/Source/modules/vr/NavigatorVR.cpp
[modify] https://crrev.com/cf7253a19d61e880f964233caec61b4df6fab647/third_party/WebKit/Source/modules/vr/NavigatorVR.h
[modify] https://crrev.com/cf7253a19d61e880f964233caec61b4df6fab647/third_party/WebKit/Source/modules/vr/VRDisplay.cpp
[modify] https://crrev.com/cf7253a19d61e880f964233caec61b4df6fab647/third_party/WebKit/Source/modules/vr/VRDisplay.h

Fixed in M59 bust not in M58.

Not sure this is really worth trying to land again, given that it's not *that* bad that we send a gesture event on headset insertion. We really just want to make sure pages don't start relying on that.

Feel free to re-open if you disagree.