Bug 1102439 - Clean up child-side PBackground before thread shutdown. r=khuey

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extra : transplant_source : %29r%7D%0CP%9F%D6%20%8B%A9%EA%EE%7D%AC%BB%80%1AB%D86
Bug 1106675 - Replace _queueOrRun with a promise-chain. r=mt
Bug 1107516 - Part 1: Add LoadContext constructor taking an nsIPrincipal. r=smaug
Bug 1107516 - Part 2: Add nsILoadGroup helpers to nsNetUtil.h. r=mcmanus
Bug 1107516 - Part 3: Make sure all workers have an nsILoadGroup when loading scripts. r=sicking, r=bent
Bug 1110494 - Fix congruentTo for MLoadTypedArrayElementStatic. r=bhackett
Bug 1111046 - Remove SPS preferences from libpref. r=mstange
CLOSED TREE