Disable ParseCapabilities.MobileEmulationDeviceName

The Blink roll will make the test fail so disable the test
temporarily. This was seen with the original author of the
test <srawlins@google.com> as they think it's an easy fix.

BUG=379339
TBR=mvanouwerkerk@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/308863005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@273963 0039d316-1c4b-4281-b951-d872f2087c98