Bug 881574 - Part 1: Support Array.length in GetPropertyPure. (r=bhackett)
Bug 881574 - Part 2: Support Array.length for ParallelGetPropertyIC. (r=nbp)
Bug 881536 - Part 1: Factor out stubbedShape logic to ParallelIonCache. (r=nbp)
Bug 881536 - Part 2: Refactor initializeAddCacheState into DispatchIonCache. (r=nbp)
Bug 881536 - Part 3: Pure path for GetElement in the VM. (r=bhackett)
Bug 881536 - Part 4: Implement ParallelGetElementIC. (r=nbp)
Bug 890524 - Fix Ion perf regression with SETELEM and double arrays. r=h4writer