Allow testing of Update 3 final

Allow testing of Update 3 final

Upgrading to Update 3 is hitting a few roadblocks, which is preventing
Windows developers from getting its fast-incremental-linking goodness.
This change lets developers opt-in to using it by going:

    set DEPOT_TOOLS_WIN_TOOLCHAIN_PRERELEASE=1
    gclient runhooks

If the environment variable is not set then this has no effect.

BUG=627216
Committed: https://crrev.com/0ea25a46ed83e529d928190cbf3259964acd3ad1
Cr-Commit-Position: refs/heads/master@{#413279}

[brucedawson, 2016-08-19 22:23:00]

Description was changed from

==========
Allow testing of Update 3 final

Upgrading to Update 3 is hitting a few roadblocks, which is preventing
Windows developers from getting its fast-incremental-linking goodness.
This change lets developers opt-in to using it by going:

    set DEPOT_TOOLS_WIN_TOOLCHAIN_PRERELEASE=1
    gclient runhooks

BUG=627216
==========

to

==========
Allow testing of Update 3 final

Upgrading to Update 3 is hitting a few roadblocks, which is preventing
Windows developers from getting its fast-incremental-linking goodness.
This change lets developers opt-in to using it by going:

    set DEPOT_TOOLS_WIN_TOOLCHAIN_PRERELEASE=1
    gclient runhooks

If the environment variable is not set then this has no effect.

BUG=627216
==========

[brucedawson, 2016-08-19 22:23:26]

brucedawson@chromium.org changed reviewers:
+ scottmg@chromium.org

[scottmg, 2016-08-19 22:30:35]

"with patches" is just the final-final-Update 3, right?

lgtm

[brucedawson, 2016-08-19 22:34:04]

On 2016/08/19 22:30:35, scottmg wrote:
> "with patches" is just the final-final-Update 3, right?

Yeah, final-final Update 3. Either a post July 12th install, or with the
post-update patch installed. Nothing custom or non-public.

[brucedawson, 2016-08-19 22:34:30]

The CQ bit was checked by brucedawson@chromium.org

[commit-bot: I haz the power, 2016-08-19 22:35:19]

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, 2016-08-19 23:17:26]

Description was changed from

==========
Allow testing of Update 3 final

Upgrading to Update 3 is hitting a few roadblocks, which is preventing
Windows developers from getting its fast-incremental-linking goodness.
This change lets developers opt-in to using it by going:

    set DEPOT_TOOLS_WIN_TOOLCHAIN_PRERELEASE=1
    gclient runhooks

If the environment variable is not set then this has no effect.

BUG=627216
==========

to

==========
Allow testing of Update 3 final

Upgrading to Update 3 is hitting a few roadblocks, which is preventing
Windows developers from getting its fast-incremental-linking goodness.
This change lets developers opt-in to using it by going:

    set DEPOT_TOOLS_WIN_TOOLCHAIN_PRERELEASE=1
    gclient runhooks

If the environment variable is not set then this has no effect.

BUG=627216
==========

[commit-bot: I haz the power, 2016-08-19 23:17:29]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-19 23:18:34]

Description was changed from

==========
Allow testing of Update 3 final

Upgrading to Update 3 is hitting a few roadblocks, which is preventing
Windows developers from getting its fast-incremental-linking goodness.
This change lets developers opt-in to using it by going:

    set DEPOT_TOOLS_WIN_TOOLCHAIN_PRERELEASE=1
    gclient runhooks

If the environment variable is not set then this has no effect.

BUG=627216
==========

to

==========
Allow testing of Update 3 final

Upgrading to Update 3 is hitting a few roadblocks, which is preventing
Windows developers from getting its fast-incremental-linking goodness.
This change lets developers opt-in to using it by going:

    set DEPOT_TOOLS_WIN_TOOLCHAIN_PRERELEASE=1
    gclient runhooks

If the environment variable is not set then this has no effect.

BUG=627216

Committed: https://crrev.com/0ea25a46ed83e529d928190cbf3259964acd3ad1
Cr-Commit-Position: refs/heads/master@{#413279}
==========

[commit-bot: I haz the power, 2016-08-19 23:18:35]

Patchset 2 (id:??) landed as
https://crrev.com/0ea25a46ed83e529d928190cbf3259964acd3ad1
Cr-Commit-Position: refs/heads/master@{#413279}