Bug 1084439.  Remove ResolveWorkerClasses in favor of [Exposed=System] annotations.  r=bholley
Bug 1083591.  Support stringifiers and jsonifiers on non-concrete Web IDL interfaces as well, since they make sense there.  r=peterv
Bug 1083851 part 1.  Capture allocation stacks at promise creation time.  r=nsm
Bug 1083851 part 2.  Capture stacks at promise rejection time.  r=nsm
Bug 1083851 part 3.  Capture stacks at promise fulfillment time.  r=nsm
Bug 1083851 part 4.  Expose promise stacks on PromiseDebugging.
Bug 1083950.  Add a way to get the promises that depend on a given promise via PromiseDebugging.  r=nsm