Bug 277657 – Remove the indirection in isMouseFocusable() to call directly the quirk

• Component: WebKit Misc.
• Status: RESOLVED FIXED

[Karl Dubost]

On https://searchfox.org/wubkat/rev/b36cbce69fddb7da33823f316bd8ead5bebee970/Source/WebCore/html/HTMLFormControlElement.cpp#492

there is 

```
// FIXME: We should remove the quirk once <rdar://problem/47334655> is fixed.
bool HTMLFormControlElement::needsMouseFocusableQuirk() const
{
    return document().quirks().needsFormControlToBeMouseFocusable();
}
```


which is used in https://searchfox.org/wubkat/rev/b36cbce69fddb7da33823f316bd8ead5bebee970/Source/WebCore/html/HTMLFormControlElement.cpp#251-260


```
bool HTMLFormControlElement::isMouseFocusable() const
{
#if (PLATFORM(GTK) || PLATFORM(WPE))
    return HTMLElement::isMouseFocusable();
#else
    if (!!tabIndexSetExplicitly() || needsMouseFocusableQuirk())
        return HTMLElement::isMouseFocusable();
    return false;
#endif
}
```


it doesn't need the indirection. 


1. The function should isMouseFocusable() should directly call document().quirks().needsFormControlToBeMouseFocusable()
2. Do not forget about moving the comment too.

[Radar WebKit Bug Importer]

<rdar://problem/133252329>

[Nathan Solomon]

Pull request: https://github.com/WebKit/WebKit/pull/31972

[EWS]

Committed 282062@main (76bcd3ed6795): <https://commits.webkit.org/282062@main>

Reviewed commits have been landed. Closing PR #31972 and removing active labels.