The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b4cf059891075dc7f6e45bdc114118c1e5579f46

commit b4cf059891075dc7f6e45bdc114118c1e5579f46
Author: khmel <khmel@chromium.org>
Date: Wed Aug 10 17:47:34 2016

arc: Fix logic of selection terms version in OptIn.

We are not allowed to show ToS in different than Chrome UI language,
except the case when we are unable to determine right combination of
language and zone and show ToS in default English. This also provides
handling of navigator.language in 2 forwats, short and long which
can appear in terms.

BUG= 636178 
BUG=b/30434808
TEST=Manually on device, various combinations of time zone,
     UI languages and VPN.
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2234573002
Cr-Commit-Position: refs/heads/master@{#411077}

[modify] https://crrev.com/b4cf059891075dc7f6e45bdc114118c1e5579f46/chrome/browser/resources/chromeos/arc_support/playstore.js

This is specific to Chrome OS, right?

Yes, only for Chrome OS and only for Arc.

+ ketakid@ (Chrome OS TPM)

Your change meets the bar and is auto-approved for M53 (branch: 2785)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/708ed43a3dee6c4963c039e0f0bf1d8113306dd5

commit 708ed43a3dee6c4963c039e0f0bf1d8113306dd5
Author: khmel <khmel@chromium.org>
Date: Thu Aug 11 18:04:22 2016

arc: Fix logic of selection terms version in OptIn.

We are not allowed to show ToS in different than Chrome UI language,
except the case when we are unable to determine right combination of
language and zone and show ToS in default English. This also provides
handling of navigator.language in 2 forwats, short and long which
can appear in terms.

BUG= 636178 
BUG=b/30434808
TEST=Manually on device, various combinations of time zone,
     UI languages and VPN.
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

NOTRY=true
NOPRESUBMIT=true
TBR=reviewer@chromium.org

Review-Url: https://codereview.chromium.org/2234573002
Cr-Commit-Position: refs/heads/master@{#411077}
(cherry picked from commit b4cf059891075dc7f6e45bdc114118c1e5579f46)

Review-Url: https://codereview.chromium.org/2243493003
Cr-Commit-Position: refs/branch-heads/2785@{#564}
Cr-Branched-From: 68623971be0cfc492a2cb0427d7f478e7b214c24-refs/heads/master@{#403382}

[modify] https://crrev.com/708ed43a3dee6c4963c039e0f0bf1d8113306dd5/chrome/browser/resources/chromeos/arc_support/playstore.js

Chrome OS 53.0.2785.70/8530.62.0 beta cyan