Revert of Don't set cpu architecture field on iOS in UMA logs. (patchset #2 id:20001 of https://cod…

Revert of Don't set cpu architecture field on iOS in UMA logs. (patchset #2 id:20001 of https://codereview.chromium.org/2671433002/ )

Reason for revert:
This breaks Chrome iOS dashboards because cpu_architecture is the only field where we have the device model info (e.g. iPhone7,2).

Original issue's description:
> Don't set cpu architecture field on iOS in UMA logs.
>
> The value we were setting it to before was not correct, so this
> change instead just makes the value not get set on iOS.
>
> BUG=370104
>
> Review-Url: https://codereview.chromium.org/2671433002
> Cr-Commit-Position: refs/heads/master@{#447578}
> Committed: https://chromium.googlesource.com/chromium/src/+/a86e8e115054ad167458d0379980db5473cb20de

TBR=rkaplow@chromium.org,asvitkine@chromium.org
BUG=370104, 718080
Review-Url: https://codereview.chromium.org/2855943005
Cr-Commit-Position: refs/heads/master@{#469062}
(cherry picked from commit 9f89092a8f533da1537b0a441b1e137b3d3b2728)

Review-Url: https://codereview.chromium.org/2860093004 .
Cr-Commit-Position: refs/branch-heads/3071@{#416}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/8c13071f30acdea27138d85bb960103f8506f099

[sczs, 2017-05-05 15:23:07]

Description was changed from

==========
Revert of Don't set cpu architecture field on iOS in UMA logs. (patchset #2
id:20001 of https://codereview.chromium.org/2671433002/ )

Reason for revert:
This breaks Chrome iOS dashboards because cpu_architecture is the only field
where we have the device model info (e.g. iPhone7,2).

Original issue's description:
> Don't set cpu architecture field on iOS in UMA logs.
>
> The value we were setting it to before was not correct, so this
> change instead just makes the value not get set on iOS.
>
> BUG=370104
>
> Review-Url: https://codereview.chromium.org/2671433002
> Cr-Commit-Position: refs/heads/master@{#447578}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a86e8e115054ad167458d0379980...

TBR=rkaplow@chromium.org,asvitkine@chromium.org
BUG=370104, 718080

Review-Url: https://codereview.chromium.org/2855943005
Cr-Commit-Position: refs/heads/master@{#469062}
(cherry picked from commit 9f89092a8f533da1537b0a441b1e137b3d3b2728)
==========

to

==========
Revert of Don't set cpu architecture field on iOS in UMA logs. (patchset #2
id:20001 of https://codereview.chromium.org/2671433002/ )

Reason for revert:
This breaks Chrome iOS dashboards because cpu_architecture is the only field
where we have the device model info (e.g. iPhone7,2).

Original issue's description:
> Don't set cpu architecture field on iOS in UMA logs.
>
> The value we were setting it to before was not correct, so this
> change instead just makes the value not get set on iOS.
>
> BUG=370104
>
> Review-Url: https://codereview.chromium.org/2671433002
> Cr-Commit-Position: refs/heads/master@{#447578}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a86e8e115054ad167458d0379980...

TBR=rkaplow@chromium.org,asvitkine@chromium.org
BUG=370104, 718080

Review-Url: https://codereview.chromium.org/2855943005
Cr-Commit-Position: refs/heads/master@{#469062}
(cherry picked from commit 9f89092a8f533da1537b0a441b1e137b3d3b2728)

Review-Url: https://codereview.chromium.org/2860093004 .
Cr-Commit-Position: refs/branch-heads/3071@{#416}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/8c13071f30acdea27138d85bb960...
==========

[sczs, 2017-05-05 15:23:09]

Committed patchset #1 (id:1) manually as
8c13071f30acdea27138d85bb960103f8506f099.