Make page_cycler explicitly enable or disable FCM

Enable FCM only on the moz pageset (which had the largest regression
with FCM), and explicitly disable it everywhere else.

This is to be deleted once the bot issue causing moz to be slow has
been diagnosed and fixed.

BUG=180025


Review URL: https://chromiumcodereview.appspot.com/13968003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@193605 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed