VR: Make work done during onResume in VrShellDelegate asynchronous.

VR: Make work done during onResume in VrShellDelegate asynchronous.

Makes registerDaydreamIntent run after onResume. Makes static checking of VR support level in onResume an async task.

Note that doing this work asynchronously is racy. In practice this shouldn't be an issue because the user would have to put their phone into their daydream headset within a few milliseconds of launching chrome. The failure mode is also not terrible, the user would return to Daydream home instead of Chrome.

BUG=718136
Review-Url: https://codereview.chromium.org/2859893002
Cr-Commit-Position: refs/heads/master@{#469141}
(cherry picked from commit 2d3151bb4c3bf0346ceec9c4b43f895607fe8d2c)

Review-Url: https://codereview.chromium.org/2855123008 .
Cr-Commit-Position: refs/branch-heads/3071@{#415}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/aab1355ed623db4c9af5a6ec04693e170db9bb3d

[mthiesse, 2017-05-05 14:34:15]

Description was changed from

==========
VR: Make work done during onResume in VrShellDelegate asynchronous.

Makes registerDaydreamIntent run after onResume. Makes static checking of VR
support level in onResume an async task.

Note that doing this work asynchronously is racy. In practice this shouldn't be
an issue because the user would have to put their phone into their daydream
headset within a few milliseconds of launching chrome. The failure mode is also
not terrible, the user would return to Daydream home instead of Chrome.

BUG=718136

Review-Url: https://codereview.chromium.org/2859893002
Cr-Commit-Position: refs/heads/master@{#469141}
(cherry picked from commit 2d3151bb4c3bf0346ceec9c4b43f895607fe8d2c)
==========

to

==========
VR: Make work done during onResume in VrShellDelegate asynchronous.

Makes registerDaydreamIntent run after onResume. Makes static checking of VR
support level in onResume an async task.

Note that doing this work asynchronously is racy. In practice this shouldn't be
an issue because the user would have to put their phone into their daydream
headset within a few milliseconds of launching chrome. The failure mode is also
not terrible, the user would return to Daydream home instead of Chrome.

BUG=718136

Review-Url: https://codereview.chromium.org/2859893002
Cr-Commit-Position: refs/heads/master@{#469141}
(cherry picked from commit 2d3151bb4c3bf0346ceec9c4b43f895607fe8d2c)

Review-Url: https://codereview.chromium.org/2855123008 .
Cr-Commit-Position: refs/branch-heads/3071@{#415}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/aab1355ed623db4c9af5a6ec0469...
==========

[mthiesse, 2017-05-05 14:34:17]

Committed patchset #1 (id:1) manually as
aab1355ed623db4c9af5a6ec04693e170db9bb3d.