Changes in 20200809213940

Built from d1de0bdfee4fcc742faa7126c9c4d1c18d89bfe3

..index..
Bug 1265275 R[Core:DOM: Core & HTML][Presentation WebAPI] Remove "using namespace" from dom/presentation cpp files
Bug 1483269 R[Core:JavaScript: GC]js::jit::AbortReason and js::gc::AbortReason do no play nice in very-unified builds
Bug 1656802 R[Core:Layout: Scrolling and Overflow]handle overflow hidden scrollbars and related with pinch zooming
Bug 1657437 R[Core:Layout: Text and Fonts]Lone CR causes previous whitespace to get collapsed.
Bug 1657892 R[Core:Layout: Text and Fonts][macOS] Reflow zoom lags behind by user interaction (profile showing lots of time in font code)
Bug 1658010 R[Core:Privacy: Anti-Tracking]Crash in [@ mozilla::ContentBlockingNotifier::OnEvent]
Bug 888685 R[Core:SVG]SVG helper classes don't need to inherit nsISupports
Bug 1653858 R[Core:SVG]Introduce eUSE_TARGET and use it rather than listing all elements that can be use targets
Bug 1657747 R[Core:Widget: Gtk][Wayland] Remove DMABuf backend from SW compositor
Bug 1657205 R[Core:XPCOM]Crash in [@ OOM | large | mozalloc_abort | moz_xmalloc | mozilla::CacheAwareZipReader::PutBufferIntoCache]
Bug 1657609 R[Core:XPCOM]delete a bunch of duplicate, unnecessary code from xptcall implementations
Bug 1654862 A[Firefox:Address Bar]Show suggestions for the empty query when in search mode
Bug 1657572 R[Firefox:Address Bar]Store form history source from search access points
Bug 1657568 R[Firefox:Sync]Sync more preferences in Privacy & Security
Bug 1537703 R[Firefox Build System:General]Use llvm-rc.exe instead of rc.exe when available
Bug 1658027 R[Toolkit:Form Autofill]Separate visual interactions on Credit Card Autofill for A/B testing
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Changes to 16 bugs - 14 fixed.