Disable OptionsWebUITest.OverlayShowDoesntShift on win.

BUG=315250
TBR=estade@chromium.org

Review URL: https://codereview.chromium.org/59403005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233090 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233090