Bug 297439 – Fix -Wpreferred-type-bitfield-enum-conversion warnings in WebCore

• Component: Layout and Rendering
• Status: RESOLVED FIXED

[David Kilzer (:ddkilzer)]

Fix -Wpreferred-type-bitfield-enum-conversion warnings in WebCore.

```
/System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/WebCore.framework/PrivateHeaders/RenderStyle.h:433:99: error: bit-field 'pseudoElementType' is not wide enough to store all enumerators of preferred type 'PseudoId' [-Werror,-Wpreferred-type-bitfield-enum-conversion]
      433 |     void setPseudoElementType(PseudoId pseudoElementType) { m_nonInheritedFlags.pseudoElementType = static_cast<unsigned>(pseudoElementType); }
          |                                                                                                   ^
/System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/WebCore.framework/PrivateHeaders/RenderStyle.h:2378:63: note: widen this field to 18 bits to store all values of 'PseudoId'
     2378 |         PREFERRED_TYPE(PseudoId) unsigned pseudoElementType : PseudoElementTypeBits;
          |                                                               ^~~~~~~~~~~~~~~~~~~~~

/System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/WebCore.framework/PrivateHeaders/FillLayer.h:127:42: error: bit-field 'm_origin' is not wide enough to store all enumerators of preferred type 'FillBox' [-Werror,-Wpreferred-type-bitfield-enum-conversion]
      127 |     void setOrigin(FillBox b) { m_origin = static_cast<unsigned>(b); m_originSet = true; }
          |                                          ^
/System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/WebCore.framework/PrivateHeaders/FillLayer.h:201:49: note: widen this field to 3 bits to store all values of 'FillBox'
      201 |     PREFERRED_TYPE(FillBox) unsigned m_origin : 2;
          |                                                 ^
```

<rdar://158245532>

[David Kilzer (:ddkilzer)]

Pull request: https://github.com/WebKit/WebKit/pull/49434

[EWS]

Committed 298737@main (5a74e184fd22): <https://commits.webkit.org/298737@main>

Reviewed commits have been landed. Closing PR #49434 and removing active labels.

[David Kilzer (:ddkilzer)]

Accidentally reverted here:

  [Style] Replace FillLayer linked list with strong style typed fixed vector
  <https://bugs.webkit.org/show_bug.cgi?id=298113>
  <https://commits.webkit.org/299407@main>

Fixing again here:

Bug 298883: Re-fix -Wpreferred-type-bitfield-enum-conversion warnings in WebCore
<https://bugs.webkit.org/show_bug.cgi?id=298883>