DevTools: Timeline section of devtools flickering of unwanted scroll bar seen in 'Records' row.
DevTools: Timeline section of devtools flickering of unwanted scroll bar seen in 'Records' row.

BUG=376250

Review URL: https://codereview.chromium.org/297863003

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@174669 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs