Backed out changeset 630b25ba7f69 (bug 910429) for build bustage on a CLOSED TREE.
Bug 908019 - Split up watchdog tests to run in parallel. r=mrbkap

This speeds up local xpcshell-test runs by ~6 seconds.
Bug 909401 - Fix MacroAssembler::tagValue on x86/ARM to not assert if the input register is the same as the output type register. r=nbp
Bug 903993 - null check the SkStream's getFileName() before attempting to use it, as the SkStream may not be an SkFILEStream r=snorp