bug 886086  fix intermittent test failure in chat window tests, r=felipe
bug 869278 fix intermittent mozSocial test failure, r=felipe
Bug 886156 - Part 1: belt-and-braces safety in initialization of ProfileInformationCache. r=nalexander
Bug 886156 - Part 2: don't initialize PIC with null add-ons. r=nalexander