Bug 315309 – Refactor DeprecatedCSSOMValue types to not wrap CSSValue (Part 1)

• Status: RESOLVED
• Resolution: FIXED
• Component: CSS

[Sam Weinig]

Refactor DeprecatedCSSOMValue types to not wrap CSSValue (Part 1).

Add infrastructure for creating DeprecatedCSSOMValues for strong CSS and Style types directly.

- Add a lazy serialization subclass that uses a WTF::Function to type-erase the strong type.
- Add DeprecatedCSSOMValueCreation protocols for both CSS and Style, allowing direct creation of the values.

[Sam Weinig]

Future changes in this series will:
- Change DeprecatedCSSOMPrimitiveValue to use a Variant backing of the supported
  primitive types rather than the current CSSValue.
- Remove DeprecatedCSSOMComplexValue, replacing remaining uses with DeprecatedCSSOMLazySerializingCustomValue.
- Add support in StyleExtractor for directly creating the appropriate DeprecatedCSSOMValue
  for Style types.

[Sam Weinig]

Pull request: https://github.com/WebKit/WebKit/pull/65424

[EWS]

Committed 313787@main (4b973b0b8ca7): <https://commits.webkit.org/313787@main>

Reviewed commits have been landed. Closing PR #65424 and removing active labels.

[Radar WebKit Bug Importer]

<rdar://problem/177780681>