Telemetry testScrollAction fails after a Blink roll 159695:159835

BUG=308846
TBR=dtu

Review URL: https://codereview.chromium.org/28403002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229319 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229319