Bug 852246 - Allow installing over an app with >= version in Android 4.2 via the agent;r=jmaher
Bug 771331 - make form elements fire events when <input type=password> elements are added/removed; r=smaug
Bug 851349 - Possible fix for intermittent failures. r=paul
Bug 841350 - Follow-up to fix 'this.updateCurrentBrowser is not a function'; r=me+bustage
Merge m-c to fx-team.
Bug 850247 - Make nsRequestObserverProxy proxy events to the main thread only. r=mcmanus

I'm doing this so that I can safely make this class use nsMainThreadPtr{Handle,Holder}.
There's no theoretical reason why we couldn't support other threads here, but it
would mean implementing that functionality in the PtrHolders, renaming them, and
weakening their assertions/invariants. AFAICT the consumers here don't actually have
a reason to proxy events anywhere but the main thread, so I'm just going to do this
rather than writing code to support something that we don't do (and thus can't test).
Bug 850247 - Make nsRequestObserverProxy hold onto its context. r=mcmanus

Both the consumers just do this manually. The context here is sometimes an
XPCWrappedJS, so passing it around with nsCOMPtrs off-main-thread can't
happen anymore.

We add assertions in OnStartRequest/OnStopRequest to catch any consumers
that might try to change contexts midstream.
Bug 850247 - Move nsRequestObserverProxy to nsMainThreadPtr{Holder,Handle}. r=mcmanus
Merge m-c to inbound.
bug 809978: retry link I/O on potential race conditions