Revert of mac: Roll hermetic toolchain to Xcode 8.3.2.

Revert of mac: Roll hermetic toolchain to Xcode 8.3.2. (patchset #2 id:20001 of https://codereview.chromium.org/2950933003/ )

Reason for revert:
Reverting. Failed to update all perf Mac Builder slaves to 10.12.

Original issue's description:
> mac: Roll hermetic toolchain to Xcode 8.3.2.
> 
> Xcode 8.3.2 requires macOS 10.12+. This version of Xcode 8.3.2 has both the
> 10.10 and 10.12 SDKs, and builds will continue to use the 10.10 SDK.
> 
> To support machines running macOS versions < 10.12, but don't require building
> targets, this CL also:
>   * Does not download the hermetic toolchain if the macOS version does not
>     support the toolchain version.
>   * Does not allow building targets with the default hermetic toolchain if the
>     macOS version does not support the toolchain version.
> 
> BUG=624049
> 
> Review-Url: https://codereview.chromium.org/2950933003
> Cr-Original-Commit-Position: refs/heads/master@{#481225}
> Committed: https://chromium.googlesource.com/chromium/src/+/2f19b143e444c920e643feda583e9ceb72d29c8e
> Review-Url: https://codereview.chromium.org/2950933003
> Cr-Commit-Position: refs/heads/master@{#481692}
> Committed: https://chromium.googlesource.com/chromium/src/+/350127923178be13e901e047ea5719890e7af365

TBR=dpranke@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=624049
Review-Url: https://codereview.chromium.org/2957483002
Cr-Commit-Position: refs/heads/master@{#481733}
Committed: https://chromium.googlesource.com/chromium/src/+/099118540bc82d533a24e66c4778db9e2f0c6356

[erikchen, 2017-06-23 00:07:11]

The CQ bit was checked by erikchen@chromium.org

[erikchen, 2017-06-23 00:07:11]

Created Revert of mac: Roll hermetic toolchain to Xcode 8.3.2.

[commit-bot: I haz the power, 2017-06-23 00:07:37]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-06-23 00:07:59]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1498176431202680, "parent_rev":
"a58aca05fb59a513a0857538de9e79eea712d4e4", "commit_rev":
"099118540bc82d533a24e66c4778db9e2f0c6356"}

[commit-bot: I haz the power, 2017-06-23 00:08:12]

Description was changed from

==========
Revert of mac: Roll hermetic toolchain to Xcode 8.3.2. (patchset #2 id:20001 of
https://codereview.chromium.org/2950933003/ )

Reason for revert:
Reverting. Failed to update all perf Mac Builder slaves to 10.12.

Original issue's description:
> mac: Roll hermetic toolchain to Xcode 8.3.2.
> 
> Xcode 8.3.2 requires macOS 10.12+. This version of Xcode 8.3.2 has both the
> 10.10 and 10.12 SDKs, and builds will continue to use the 10.10 SDK.
> 
> To support machines running macOS versions < 10.12, but don't require building
> targets, this CL also:
>   * Does not download the hermetic toolchain if the macOS version does not
>     support the toolchain version.
>   * Does not allow building targets with the default hermetic toolchain if the
>     macOS version does not support the toolchain version.
> 
> BUG=624049
> 
> Review-Url: https://codereview.chromium.org/2950933003
> Cr-Original-Commit-Position: refs/heads/master@{#481225}
> Committed:
https://chromium.googlesource.com/chromium/src/+/2f19b143e444c920e643feda583e...
> Review-Url: https://codereview.chromium.org/2950933003
> Cr-Commit-Position: refs/heads/master@{#481692}
> Committed:
https://chromium.googlesource.com/chromium/src/+/350127923178be13e901e047ea57...

TBR=dpranke@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=624049
==========

to

==========
Revert of mac: Roll hermetic toolchain to Xcode 8.3.2. (patchset #2 id:20001 of
https://codereview.chromium.org/2950933003/ )

Reason for revert:
Reverting. Failed to update all perf Mac Builder slaves to 10.12.

Original issue's description:
> mac: Roll hermetic toolchain to Xcode 8.3.2.
> 
> Xcode 8.3.2 requires macOS 10.12+. This version of Xcode 8.3.2 has both the
> 10.10 and 10.12 SDKs, and builds will continue to use the 10.10 SDK.
> 
> To support machines running macOS versions < 10.12, but don't require building
> targets, this CL also:
>   * Does not download the hermetic toolchain if the macOS version does not
>     support the toolchain version.
>   * Does not allow building targets with the default hermetic toolchain if the
>     macOS version does not support the toolchain version.
> 
> BUG=624049
> 
> Review-Url: https://codereview.chromium.org/2950933003
> Cr-Original-Commit-Position: refs/heads/master@{#481225}
> Committed:
https://chromium.googlesource.com/chromium/src/+/2f19b143e444c920e643feda583e...
> Review-Url: https://codereview.chromium.org/2950933003
> Cr-Commit-Position: refs/heads/master@{#481692}
> Committed:
https://chromium.googlesource.com/chromium/src/+/350127923178be13e901e047ea57...

TBR=dpranke@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=624049

Review-Url: https://codereview.chromium.org/2957483002
Cr-Commit-Position: refs/heads/master@{#481733}
Committed:
https://chromium.googlesource.com/chromium/src/+/099118540bc82d533a24e66c4778...
==========

[commit-bot: I haz the power, 2017-06-23 00:08:13]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/099118540bc82d533a24e66c4778...

[Dirk Pranke, 2017-06-23 00:12:24]

lgtm