Overflow scroll tests slow-flake after commit 5534a2b2972534b523014c803e1e0e0541855cc7
Overflow scroll tests slow-flake after commit 5534a2b2972534b523014c803e1e0e0541855cc7

virtual/threaded/fast/scroll-behavior/overflow-scroll-root-frame-animates.html
virtual/threaded/fast/scroll-behavior/overflow-scroll-animates.html

These tests either run in 1 second if they pass, or timeout at 90 seconds
(in debug), or 30 seconds (in release) builds after the commit landed.

TBR=ymalik@chromium.org
NOTRY=true
BUG=552556

Review URL: https://codereview.chromium.org/1547933002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#366740}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk