Revert of Changing default Windows compiler to VS2017

Revert of Changing default Windows compiler to VS2017 (patchset #1 id:1 of https://codereview.chromium.org/2877993002/ )

Reason for revert:
We have a canary.

Original issue's description:
> Changing default Windows compiler to VS2017
> 
> Doing another VS2017 test over the week end now that the PGO issues have
> been fixed.
> 
> This CL is currently purely for testing purposes and will be reverted by
> the end of the week end.
> 
> BUG=683729
> 
> Review-Url: https://codereview.chromium.org/2877993002
> Cr-Commit-Position: refs/heads/master@{#475212}
> Committed: https://chromium.googlesource.com/chromium/src/+/833aa96095e1f827ffc05af8bf545a094ffa6e35

TBR=brucedawson@chromium.org,sebmarchand@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=683729
Review-Url: https://codereview.chromium.org/2909903002
Cr-Commit-Position: refs/heads/master@{#475354}
Committed: https://chromium.googlesource.com/chromium/src/+/5ea5799ced8c179ee57cf877d370e763e76d819c

[Nico, 2017-05-29 13:45:20]

The CQ bit was checked by thakis@chromium.org

[Nico, 2017-05-29 13:45:20]

Created Revert of Changing default Windows compiler to VS2017

[commit-bot: I haz the power, 2017-05-29 13:45:35]

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, 2017-05-29 15:14:33]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1496065520494240, "parent_rev":
"b57e420cea18ea14d1217a167868687679a89d3c", "commit_rev":
"5ea5799ced8c179ee57cf877d370e763e76d819c"}

[commit-bot: I haz the power, 2017-05-29 15:14:40]

Description was changed from

==========
Revert of Changing default Windows compiler to VS2017 (patchset #1 id:1 of
https://codereview.chromium.org/2877993002/ )

Reason for revert:
We have a canary.

Original issue's description:
> Changing default Windows compiler to VS2017
> 
> Doing another VS2017 test over the week end now that the PGO issues have
> been fixed.
> 
> This CL is currently purely for testing purposes and will be reverted by
> the end of the week end.
> 
> BUG=683729
> 
> Review-Url: https://codereview.chromium.org/2877993002
> Cr-Commit-Position: refs/heads/master@{#475212}
> Committed:
https://chromium.googlesource.com/chromium/src/+/833aa96095e1f827ffc05af8bf54...

TBR=brucedawson@chromium.org,sebmarchand@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=683729
==========

to

==========
Revert of Changing default Windows compiler to VS2017 (patchset #1 id:1 of
https://codereview.chromium.org/2877993002/ )

Reason for revert:
We have a canary.

Original issue's description:
> Changing default Windows compiler to VS2017
> 
> Doing another VS2017 test over the week end now that the PGO issues have
> been fixed.
> 
> This CL is currently purely for testing purposes and will be reverted by
> the end of the week end.
> 
> BUG=683729
> 
> Review-Url: https://codereview.chromium.org/2877993002
> Cr-Commit-Position: refs/heads/master@{#475212}
> Committed:
https://chromium.googlesource.com/chromium/src/+/833aa96095e1f827ffc05af8bf54...

TBR=brucedawson@chromium.org,sebmarchand@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=683729

Review-Url: https://codereview.chromium.org/2909903002
Cr-Commit-Position: refs/heads/master@{#475354}
Committed:
https://chromium.googlesource.com/chromium/src/+/5ea5799ced8c179ee57cf877d370...
==========

[commit-bot: I haz the power, 2017-05-29 15:14:42]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/5ea5799ced8c179ee57cf877d370...

[Sébastien Marchand, 2017-05-29 15:22:03]

lgtm