Bug 879956 - Don't print email address to logcat when syncing. r=rnewman
Bug 880171 - Part 1: return null if unable to retrieve storage in EnvironmentBuilder. r=nalexander
Bug 880171 - Part 2: handle failure to retrieve storage from EnvironmentBuilder. r=nalexander
Bug 880549 - Include add-on blocklist state in payload. r=mfinkle
Merge m-c to s-c.
No bug, Automated blocklist update from host bld-linux64-ec2-645 - a=blocklist-update
No bug, Automated HSTS preload list update from host bld-linux64-ec2-615 - a=hsts-update
Bug 877584: Route JS holding through the cycle collection runtime so it can do different things on different threads. r=mccr8
Merge mozilla-central into mozilla-inbound