The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5d39957263af5c3c188eb3c65f40f15428cecbee

commit 5d39957263af5c3c188eb3c65f40f15428cecbee
Author: Alexei Filippov <alph@chromium.org>
Date: Tue Jan 08 22:40:53 2019

DevTools: Fix memory allocation timeline range selection.

Make it show all the heap obejcts when the selection window touches the
left bound of interval.

BUG= 919976 

Change-Id: I4775981fd31c58708ff5d296c99f28ecf727bc63
Reviewed-on: https://chromium-review.googlesource.com/c/1400814
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#620913}
[modify] https://crrev.com/5d39957263af5c3c188eb3c65f40f15428cecbee/third_party/blink/renderer/devtools/front_end/profiler/HeapTimelineOverview.js