The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1130d5676cbf7664763c305d1ccb038593e6d4fa

commit 1130d5676cbf7664763c305d1ccb038593e6d4fa
Author: Hannes Payer <hpayer@chromium.org>
Date: Tue Jun 05 07:37:31 2018

Add chrome://flags entry for V8 Orinoco garbage collector

- Adds chrome://flags entry
- Adds a FeatureFlag
- Make the V8 --single-threaded-gc dependent on the Chrome flag

Bug: chromium:848670
Change-Id: I08c297867ad3e4ab3b3388525b129da497b1115c
Reviewed-on: https://chromium-review.googlesource.com/1082292
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#564395}
[modify] https://crrev.com/1130d5676cbf7664763c305d1ccb038593e6d4fa/chrome/browser/about_flags.cc
[modify] https://crrev.com/1130d5676cbf7664763c305d1ccb038593e6d4fa/chrome/browser/flag_descriptions.cc
[modify] https://crrev.com/1130d5676cbf7664763c305d1ccb038593e6d4fa/chrome/browser/flag_descriptions.h
[modify] https://crrev.com/1130d5676cbf7664763c305d1ccb038593e6d4fa/content/public/common/content_features.cc
[modify] https://crrev.com/1130d5676cbf7664763c305d1ccb038593e6d4fa/content/public/common/content_features.h
[modify] https://crrev.com/1130d5676cbf7664763c305d1ccb038593e6d4fa/content/renderer/render_process_impl.cc
[modify] https://crrev.com/1130d5676cbf7664763c305d1ccb038593e6d4fa/tools/metrics/histograms/enums.xml

Adding rkaplow as metrics ambassador.