Changes in 20191208094449

Built from 053b0bb00fedc42ea54e7a6b8e32843d7d6b7849

..index..
Bug 1486964 R[Core:CSS Parsing and Computation]Drop -moz-touch-enabled
Bug 1600565 N[Core:DOM: Core & HTML]FORGET_SKIPPABLE_FREQUENCY telemetry increase in Firefox Nightly builds from 2019-11-27
Bug 1595964 R[Core:DOM: Service Workers]Expose mEvaluatingWorker to devtools
Bug 1600545 R[Core:General]Mechanically remove useless inclusions of header files generated from IDL templates
Bug 1601963 R[Core:JavaScript Engine]Combine JSScript / LazyScript constructor
Bug 1511958 A[Core:Javascript: WebAssembly][meta] Implement i64<>JavaScript’s BigInt conversions proposal
Bug 1596939 R[DevTools:Debugger]Support reliable pausing in service worker event handlers
Bug 1601404 R[Firefox:Menus]Zoom "Reset" menu should be renamed "Actual Size"
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Changes to 8 bugs - 6 fixed.