Bug 904602 - Optimize tree traversing in Range, r=mats

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extra : rebase_source : b223d822792e95c0b5bbd40046c32f1049b068d8
Bug 902426 - Do not allow duplicate entries in the CRC2D demotion list r=mattwoodrow

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extra : rebase_source : c7c344f2b88065f46c06c99fa0bf868367b6b9ab
Bug 904292 - Clean up marionette pyflakes warnings;r=mdas
Bug 904001 - Blocklist the old Relevant Knowledge DLLs; r=vlad
Bug 901630: Remove support for the cc thread. r=mccr8
Bug 904143: Remove nsISupports inheritance from PromiseResolver. r=smaug
Bug 904264 - Don't #include js/MemoryMetrics.h in xpcpublic.h; r=bholley
Bug 890744 - Ensure updated WebIDL headers are installed after regen; r=glandium

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extra : rebase_source : d3c177eefa23f1203957a63c2d9276e38aad7818