Yes, it should be easy enough to move this to something like a //build/win:runtime_libs target.

Though not really blocking, it'd be nice to have for  issue 603131 . For now I will just copy this stuff too.

Having a stab at this:
https://chromium-review.googlesource.com/c/chromium/src/+/997794

Patrik, FYi

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5a4f610ded51627273b1f05e83379b1ce8e3c6aa

commit 5a4f610ded51627273b1f05e83379b1ce8e3c6aa
Author: Michael Achenbach <machenbach@chromium.org>
Date: Fri Apr 06 18:53:15 2018

[build] Move windows runtime-libs gn configs to src/build

This will allow webrtc and v8 to share the configs.

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win-msvc-dbg

Bug:  653569 
Change-Id: I41a4d9025f47fd3a9d6837f88c2bece108c213a8
Reviewed-on: https://chromium-review.googlesource.com/997794
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548874}
[modify] https://crrev.com/5a4f610ded51627273b1f05e83379b1ce8e3c6aa/base/BUILD.gn
[modify] https://crrev.com/5a4f610ded51627273b1f05e83379b1ce8e3c6aa/build/win/BUILD.gn

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/59a56825899d9ce84668fe07e1e5922f65ead8f6

commit 59a56825899d9ce84668fe07e1e5922f65ead8f6
Author: Michael Achenbach <machenbach@chromium.org>
Date: Mon Apr 09 07:31:15 2018

[V8] Share windows runtime dlls with src/build

Bug:  chromium:653569 
Change-Id: I2fa288d3281c75d3e5d483fb94d29efe454c633b
Reviewed-on: https://chromium-review.googlesource.com/1000773
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52464}
[modify] https://crrev.com/59a56825899d9ce84668fe07e1e5922f65ead8f6/BUILD.gn

The following revision refers to this bug:
  https://webrtc.googlesource.com/src.git/+/220609774adb9bad9178ffd9b819fc07e627989d

commit 220609774adb9bad9178ffd9b819fc07e627989d
Author: Michael Achenbach <machenbach@chromium.org>
Date: Mon Apr 09 10:33:18 2018

[build] Share windows runtime dlls with src/build

Bug:  chromium:653569 
Change-Id: I6ced614819f9fd7f594acf2fd08c491f16d3eed5
Reviewed-on: https://webrtc-review.googlesource.com/68480
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#22790}
[modify] https://crrev.com/220609774adb9bad9178ffd9b819fc07e627989d/rtc_base/BUILD.gn

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/74543b0016b007fd9e66a53b153701feba7d2b22

commit 74543b0016b007fd9e66a53b153701feba7d2b22
Author: Michael Achenbach <machenbach@chromium.org>
Date: Mon Apr 09 18:40:04 2018

Revert "[V8] Share windows runtime dlls with src/build"

This reverts commit 59a56825899d9ce84668fe07e1e5922f65ead8f6.

Reason for revert:
https://build.chromium.org/p/client.v8.fyi/builders/Win%20V8%20FYI%20Release%20%28NVIDIA%29/builds/444

Original change's description:
> [V8] Share windows runtime dlls with src/build
> 
> Bug:  chromium:653569 
> Change-Id: I2fa288d3281c75d3e5d483fb94d29efe454c633b
> Reviewed-on: https://chromium-review.googlesource.com/1000773
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#52464}

TBR=machenbach@chromium.org,yangguo@chromium.org,jgruber@chromium.org

Change-Id: Ie2fd502eb76d162678b3b90f14989ca74410b5a3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  chromium:653569 
Reviewed-on: https://chromium-review.googlesource.com/1003192
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52487}
[modify] https://crrev.com/74543b0016b007fd9e66a53b153701feba7d2b22/BUILD.gn

Needed to revert. Will analyze tomorrow.

Need to also figure out why the V8 tree didn't close on the breakage.

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/c1c40d398241f955d51b5879306377a80760b947

commit c1c40d398241f955d51b5879306377a80760b947
Author: Michael Achenbach <machenbach@chromium.org>
Date: Tue Apr 10 06:56:07 2018

Reland "[build] Share windows runtime dlls with src/build"

This is a reland of 59a56825899d9ce84668fe07e1e5922f65ead8f6

Original change's description:
> [V8] Share windows runtime dlls with src/build
>
> Bug:  chromium:653569 
> Change-Id: I2fa288d3281c75d3e5d483fb94d29efe454c633b
> Reviewed-on: https://chromium-review.googlesource.com/1000773
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#52464}

TBR=jgruber@chromium.org

Bug:  chromium:653569 
Change-Id: I74f67b25205c6505fc90e41c059fbb6f4e20c078
Reviewed-on: https://chromium-review.googlesource.com/1004454
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52500}
[modify] https://crrev.com/c1c40d398241f955d51b5879306377a80760b947/BUILD.gn

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/tools/build/+/8d57484cf5e0c7ab551366c148c179ae7ed11eb7

commit 8d57484cf5e0c7ab551366c148c179ae7ed11eb7
Author: Michael Achenbach <machenbach@chromium.org>
Date: Tue Apr 10 07:12:19 2018

[V8] Close tree on MB errors of V8's Chromium builders

The breakage causing https://crrev.com/c/1003192 went by undetected.

TBR=sergiyb@chromium.org

Bug:  653569 
Change-Id: If6d8b7860d09cb94d0776262f5234a5814a628f5
Reviewed-on: https://chromium-review.googlesource.com/1004574
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>

[modify] https://crrev.com/8d57484cf5e0c7ab551366c148c179ae7ed11eb7/scripts/slave/v8/gatekeeper_v8_tree_closers.json

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4ef762b207fa57159429481519fa4d4a9b16f409

commit 4ef762b207fa57159429481519fa4d4a9b16f409
Author: webrtc-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com <webrtc-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Date: Wed Apr 11 02:51:36 2018

Roll src/third_party/webrtc/ 4da18e89b..3ef3bfc2a (33 commits)

https://webrtc.googlesource.com/src.git/+log/4da18e89bdee..3ef3bfc2aafa

$ git log 4da18e89b..3ef3bfc2a --date=short --no-merges --format='%ad %ae %s'

Created with:
  roll-dep src/third_party/webrtc
BUG=chromium:None,chromium:None,chromium:b/77579859,chromium:828350,chromium:831081,chromium:b/77579859,chromium:None,chromium:b/77579859,chromium:653569,chromium:None,chromium:none


The AutoRoll server is located here: https://webrtc-chromium-roll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_archive_rel_ng;master.tryserver.chromium.mac:mac_chromium_archive_rel_ng;master.tryserver.chromium.win:win-msvc-dbg
TBR=webrtc-chromium-sheriffs-robots@google.com

Change-Id: I71719fdca346a7f4d6ee290065e95b89427cba70
Reviewed-on: https://chromium-review.googlesource.com/1005366
Reviewed-by: webrtc-chromium-autoroll <webrtc-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: webrtc-chromium-autoroll <webrtc-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#549738}
[modify] https://crrev.com/4ef762b207fa57159429481519fa4d4a9b16f409/DEPS