chromecall-771526: Add hiddenByChromePref function
chromecall-771526: Add hiddenByChromePref function

Several things need to be able to hide commands or parameters if we are
not in a chrome context. The 'calllog startchrome' command is one of
these.

mozilla/gcli,mozilla/gcli,joewalker/gcli,joewalker/gcli,mozilla/gcli