Disable ChromeFrameTestWithWebServer.WidgetModeIE_ObjectFocus. It regressed in [229275:229286]

BUG=308847

Review URL: https://codereview.chromium.org/28223004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229320 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229320