Good version: 56.0.2924.18
Bad version: 57.0.2950.3

Regression can be seen in the slow reports dashboard. go/slow-memory-reports

I think the CL range is
https://chromium.googlesource.com/chromium/src/+log/f021fd024223e0aef87b48c1bc811cb6b7a48762%5E..2c3ecceea409b42c873949bac0aa1acaa80451e3?pretty=fuller

This one seems suspicious since i can't see the same regression in telemetry.

commit	c3aaa23c1f5dc55fb7867fd32be50e27a343a069	
author	hanxi <hanxi@chromium.org>	Tue Dec 13 02:51:17 2016
committer	Commit bot <commit-bot@chromium.org>	Tue Dec 13 02:54:07 2016
Chrome talks to Play to install WebAPKs.

This CL includes:
- Introduce GooglePlayWebApkInstallDelegate which can bind to Phonesky's
  unpublished PlayInstallService to install WebAPKs.
- WebApkInstaller uses the GooglePlayWebApkInstallDelegate to ask Play to
  install WebAPKs. The changes are behind the finch flag.

The internal CL is: https://chrome-internal-review.googlesource.com/#/c/305912/

BUG=662149

Review-Url: https://codereview.chromium.org/2515293004
Cr-Commit-Position: refs/heads/master@{#438001}

Assigning to Maria to verify and re-assign