VR: Hide 2D screenshot when resuming activities in VR and hide 2D UI while loading VR UI.

VR: Hide 2D screenshot when resuming activities in VR and hide 2D UI while loading VR UI.

This CL adds an animation that keeps the resuming Activity hidden for 500ms while
starting up to allow time for us to draw the black overlay, also added in this CL,
and prevent 2D UI from being shown while entering VR.

This also performs some cleanup around VR entry (now that it's even more async than
before) to ensure that we don't continue trying to enter VR after we try to exit
VR (like when the activity is paused, etc.).

Bug: 728148
Change-Id: I344ad661b632bde74764b134e9d9f70f6258d68d
Reviewed-on: https://chromium-review.googlesource.com/519483
Reviewed-by: David Trainor <dtrainor@chromium.org>;
Reviewed-by: Yash Malik <ymalik@chromium.org>;
Commit-Queue: Michael Thiessen <mthiesse@chromium.org>;
Cr-Original-Commit-Position: refs/heads/master@{#476301}
Review-Url: https://codereview.chromium.org/2917393002 .
Cr-Commit-Position: refs/branch-heads/3112@{#148}
Cr-Branched-From: b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
Committed: https://chromium.googlesource.com/chromium/src/+/1d2c3e91d531a0565726650dbccceacc39dfb8a7

[mthiesse, 2017-06-05 14:22:59]

Description was changed from

==========
VR: Hide 2D screenshot when resuming activities in VR and hide 2D UI while
loading VR UI.

This CL adds an animation that keeps the resuming Activity hidden for 500ms
while
starting up to allow time for us to draw the black overlay, also added in this
CL,
and prevent 2D UI from being shown while entering VR.

This also performs some cleanup around VR entry (now that it's even more async
than
before) to ensure that we don't continue trying to enter VR after we try to exit
VR (like when the activity is paused, etc.).

Bug: 728148
Change-Id: I344ad661b632bde74764b134e9d9f70f6258d68d
Reviewed-on: https://chromium-review.googlesource.com/519483
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Yash Malik <ymalik@chromium.org>
Commit-Queue: Michael Thiessen <mthiesse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#476301}
(cherry picked from commit 907652b824e283a6109261f5e760bf879dc1537a)
==========

to

==========
VR: Hide 2D screenshot when resuming activities in VR and hide 2D UI while
loading VR UI.

This CL adds an animation that keeps the resuming Activity hidden for 500ms
while
starting up to allow time for us to draw the black overlay, also added in this
CL,
and prevent 2D UI from being shown while entering VR.

This also performs some cleanup around VR entry (now that it's even more async
than
before) to ensure that we don't continue trying to enter VR after we try to exit
VR (like when the activity is paused, etc.).

Bug: 728148
Change-Id: I344ad661b632bde74764b134e9d9f70f6258d68d
Reviewed-on: https://chromium-review.googlesource.com/519483
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Yash Malik <ymalik@chromium.org>
Commit-Queue: Michael Thiessen <mthiesse@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#476301}
Review-Url: https://codereview.chromium.org/2917393002 .
Cr-Commit-Position: refs/branch-heads/3112@{#148}
Cr-Branched-From:
b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
Committed:
https://chromium.googlesource.com/chromium/src/+/1d2c3e91d531a0565726650dbccc...
==========

[mthiesse, 2017-06-05 14:23:00]

Committed patchset #1 (id:1) manually as
1d2c3e91d531a0565726650dbccceacc39dfb8a7.