[GCM] Skip some GCM API tests for official linux bots

BUG=334029,334046
TEST=none
R=fgorski@chromium.org

Review URL: https://codereview.chromium.org/137123008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244818 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244818