The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4a4532d1fcc12e05f02486d8e8314220ce1947e3

commit 4a4532d1fcc12e05f02486d8e8314220ce1947e3
Author: Elad Alon <eladalon@chromium.org>
Date: Thu Apr 05 16:59:05 2018

Fix removal of old entries from chrome://webrtc-logs

When WebRTC textual log files are deleted, either because of
expiration or because the user clears browsing history,
entries from the logs' index are now also removed.

As a drive-by:
* Fixed the unbounded reading of a file into memory.
* Marked with TODOs (and filed bugs) for several other
  problems found.

Bug:  825977 ,  827131 
Change-Id: If34acf6290ec90c3ce99c0704c58bc8a8188f92d
Reviewed-on: https://chromium-review.googlesource.com/982055
Reviewed-by: Henrik Grunell <grunell@chromium.org>
Commit-Queue: Elad Alon <eladalon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548455}
[modify] https://crrev.com/4a4532d1fcc12e05f02486d8e8314220ce1947e3/components/webrtc_logging/browser/log_cleanup.cc
[modify] https://crrev.com/4a4532d1fcc12e05f02486d8e8314220ce1947e3/components/webrtc_logging/browser/log_cleanup.h
[modify] https://crrev.com/4a4532d1fcc12e05f02486d8e8314220ce1947e3/components/webrtc_logging/browser/log_cleanup_unittest.cc