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Test suites for Web platform specs — including WHATWG, W3C, and others

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Currently, there are two ways to produce an opacity effect in Canvas2D: set the globalAlpha property or use the opacity canvas filter. By unifying the paths for the two APIs,...

html
do not merge yet
chromium-export

This change updates the SerialPort's readable attribute so that it returns a readable byte stream instead of a readable stream that happens to return Uint8Arrays. This means that the stream...

do not merge yet
chromium-export
serial

In [/shadow-dom/declarative/innerhtml-on-ordinary-template.tentative.html ](https://github.com/web-platform-tests/wpt/blob/master/shadow-dom/declarative/innerhtml-on-ordinary-template.tentative.html) and [/shadow-dom/declarative/innerhtml-before-closing-tag.tentative.html](https://github.com/web-platform-tests/wpt/blob/master/shadow-dom/declarative/innerhtml-before-closing-tag.tentative.html) a surprising ```html ``` line is found. This triggered [this StackOverflow question](https://stackoverflow.com/questions/73283986/) where I developed the hypothesis that this line is supposed to force the...

@dholbert @davidsgrogan I am trying to understand the expectations for the static position of an absolutely positioned child of a flex container. As an example [css-flexbox/abspos/flex-abspos-staticpos-align-content-005.html](https://github.com/web-platform-tests/wpt/blob/master/css/css-flexbox/abspos/flex-abspos-staticpos-align-content-005.html) expects containers whose `align-content`...

With this change, observing pressure from within a cross-origin or a fenced frame is disallowed. Bug:1305102 Change-Id: I36ce235138ccff091575612e25d83c97d2ecf6a4 Reviewed-on: https://chromium-review.googlesource.com/3820425 WPT-Export-Revision: 3d252bcfea78f97e248c6ee0da12646a1c561ffb

do not merge yet
chromium-export
compute-pressure

The current state of test_driver.send_keys and content_shell doesn't allow sequential focus navigation [1]. The current plan is to copy the existing focus-navigation tests to WPT at web_tests/external/wpt/shadow-dom/focus-navigation/ and keep the...

shadow-dom
wg-webplatform
do not merge yet
chromium-export

Differential Revision: https://phabricator.services.mozilla.com/D154169 bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1783953 gecko-commit: 1296e290657fd9a37b9841caeeb87d0d3328e9f8 gecko-reviewers: emilio

css-sizing
mozilla:gecko-sync

Currently all PressureObservers connect to the PressureServiceImpl directly. As a result, there may be too many Mojo connections and the same PressureState is sent from the Browser to Blink multiple...

infra
do not merge yet
chromium-export
compute-pressure

This automated pull request updates interfaces/*.idl from [@webref/idl 3.13.2](https://www.npmjs.com/package/@webref/idl/v/3.13.2). Before merging, please check that any tests that depend on the updated IDL files still work. In particular, check for **gray...

interfaces