The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6a850903b0cd6b23101bf41671f19d2210d43efd

commit 6a850903b0cd6b23101bf41671f19d2210d43efd
Author: Ryan Sturm <ryansturm@chromium.org>
Date: Sat Jun 09 02:27:34 2018

Adding a capping heavy pages about:flag entry

This allows users to turn on capping heavy pages. Users will be able to
pause and resume resource loading on pages.

Bug:  851136 
Change-Id: I2587d815f74bd46415e6065ebfe8c94d7127c06f
Reviewed-on: https://chromium-review.googlesource.com/1093757
Commit-Queue: Ryan Sturm <ryansturm@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565824}
[modify] https://crrev.com/6a850903b0cd6b23101bf41671f19d2210d43efd/chrome/browser/about_flags.cc
[modify] https://crrev.com/6a850903b0cd6b23101bf41671f19d2210d43efd/chrome/browser/flag_descriptions.cc
[modify] https://crrev.com/6a850903b0cd6b23101bf41671f19d2210d43efd/chrome/browser/flag_descriptions.h
[modify] https://crrev.com/6a850903b0cd6b23101bf41671f19d2210d43efd/tools/metrics/histograms/enums.xml