AX: Handle null FileList in RenderFileUploadControl::fileTextValue()

[Tyler Wilcock]

In rare circumstances, it's possible for the FileList associated with RenderFileUploadControl::inputElement (HTMLInputElement::files()) to be null. We should avoid crashing in these scenarios.

[Radar WebKit Bug Importer]

<rdar://problem/89651456>

[Tyler Wilcock]

Created attachment 453555 [details]
Patch

[chris fleizach]

Comment on attachment 453555 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=453555&action=review

> Source/WebCore/rendering/RenderFileUploadControl.cpp:261
> +        return String();

return { };

[Tyler Wilcock]

Created attachment 453559 [details]
Patch

[Tyler Wilcock]

> > Source/WebCore/rendering/RenderFileUploadControl.cpp:261
> > +        return String();
> 
> return { };
Fixed.

[EWS]

Committed r290738 (247984@main): <https://commits.webkit.org/247984@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 453559 [details].