The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c1a71e818e43ee2d3cf0adca713b5a9eeae5f609

commit c1a71e818e43ee2d3cf0adca713b5a9eeae5f609
Author: Chris Mumford <cmumford@chromium.org>
Date: Thu Sep 21 02:34:26 2017

[memory-infra] Whitelist leveldatabase MDP.

The LevelDB MDP is already whitelisted, but leveldatabase from DBTracker
was not included.

Bug:  750819 
Change-Id: I6582a771ac4c1fb9bc14d007deb9e60396ee3306
Reviewed-on: https://chromium-review.googlesource.com/656313
Commit-Queue: Chris Mumford <cmumford@chromium.org>
Reviewed-by: Siddhartha S <ssid@chromium.org>
Cr-Commit-Position: refs/heads/master@{#503324}
[modify] https://crrev.com/c1a71e818e43ee2d3cf0adca713b5a9eeae5f609/base/trace_event/memory_infra_background_whitelist.cc

In addition to https://chromium-review.googlesource.com/656313, the commit in https://chromium-review.googlesource.com/c/chromium/src/+/657383 completes this request.