Changes in 20200223093951

Built from 4ee8b095bb525f3b2c5ebd45865f54390ffb8bc3

..index..
Bug 1614958 N[Core:Audio/Video: Playback]Disable VP9 support on Android devices without hardware decoder.
Bug 1613746 R[Core:CSS Parsing and Computation]Implement CSSStyleSheet Replace() Functionality
Bug 1617326 N[Core:Canvas: WebGL]Failures in 2.0.1 conformance2/extensions
Bug 1616790 R[Core:IPC]Perma macOS jetstream2 runner.py | application crashed [@ mozilla::ipc::DuplicateDescriptor(mozilla::ipc::TransportDescriptor const&)]
Bug 1617114 R[Core:JavaScript Engine]Don't always create a CallObject when a home-object is needed or when within derived class constructors
Bug 1617181 R[Core:JavaScript Engine]Assert .this is the only internal dot-name which end up in with-environments
Bug 1535804 R[Core:JavaScript Engine]Implement the Static class features proposal
Bug 1615955 R[Core:Layout: Scrolling and Overflow]Suppress scroll anchoring at (0, 0) scroll offset
Bug 1617037 R[Core:Layout: Text and Fonts]190ms in gfxFontEntry::SetupVariationRanges() during startup on macOS
Bug 1616003 R[Core:Storage: Quota Manager]QM: Make it possible to verify initialization status from unit tests
Bug 1617415 R[Core:String]Remove nsTSubstring<T>::ReplaceASCII
Bug 1617405 R[Core:Widget: Win32][Media-Control Windows] Controller interface doesn't change UI correctly
Bug 1617188 R[External Software Affecting Firefox:Other]Crash in [@ nvd3d9wrapx.dll | FreeLibrary]
Bug 1617190 R[Firefox Build System:General]Update dump_syms to version 0.0.4 in toolchains
Bug 1617389 R[Firefox Build System:General]When generating compile_commands.json, insert -ferror-limit before the file name
Bug 1613256 R[Firefox Build System:Source Code Analysis]VariableLengthPrefixSet.cpp: redundant return statement at the end of a function with a void return type
Bug 1617334 R[Toolkit:General]Replace nsAutoPtr usage in toolkit with UniquePtr
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Changes to 17 bugs - 15 fixed.