Changes in 20200706095144

Built from 5766d99b88f379d3eb631085387cc9cbae438b6a

..index..
Bug 1650256 R[Core:CSS Parsing and Computation]remove unused StyleAppearance values
Bug 1650258 R[Core:CSS Parsing and Computation]update appearance WPT reftest metadata some more
Bug 1650259 R[Core:CSS Parsing and Computation]remove unused function on Appearance
Bug 1647556 A[Core:DOM: Editor]Make `WSRunScanner` and `WSRunObject` stop using array of `WSFragment`
Bug 1324591 R[Core:Graphics: Layers]Jank (rather than checkerboard) async animations when we reach the edge of the pre-rendered area
Bug 1623792 N[Core:Graphics: WebRender]Optimize primitive dependency handling, taking advantage of spatial information from tile assignment.
Bug 1650662 R[Core:Graphics: WebRender]RELEASE_ASSERT that FT_Init_FreeType succeeds.
Bug 1647186 R[Core:Layout]Consider factoring the pres shell's resolution value in the partial prerender area calculation
Bug 1649807 R[Core:Networking]Consider ignoring Pragma header if Cache-Control is specified.
Bug 1647480 R[Core:Printing: Setup]Update nsIPrinterEnumerator to use the nsIPrinter interface
Bug 1604316 A[Core:Web Audio]Intermittent /webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/cors-check.https.html | X Recorded channel #0 should have contain at least one value different from 0. - assert_true: expected true got false
Bug 1634641 A[Firefox:Downloads Panel]Intermittent LeakSanitizer | leak at mozilla::dom::Console::CreateInstance, mozilla::dom::console_Binding::createInstance, CallJSNative, js::InternalCallOrConstruct
Bug 1619835 A[Firefox:General]Intermittent browser/modules/test/browser/browser_urlBar_zoom.js | Zoom reset button is currently hidden - Got false, expected true
Bug 1640418 N[GeckoView:General]Intermittent org.mozilla.geckoview.test.PromptDelegateTest.onBeforeUnloadTest | org.mozilla.geckoview.test.util.UiThreadUtils$TimeoutException: Timed out after 30000ms
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Changes to 14 bugs - 8 fixed.