[webkit-changes] [WebKit/WebKit] b39b69: Fix assertion failure in InteractionRegion::isOverlay

[Etienne Segonzac]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: b39b69a2ef1b3a4b2f8f5b2fe6f1e8cc2dff7e1c
      https://github.com/WebKit/WebKit/commit/b39b69a2ef1b3a4b2f8f5b2fe6f1e8cc2dff7e1c
  Author: Etienne Segonzac <sgz at apple.com>
  Date:   2023-07-28 (Fri, 28 Jul 2023)

  Changed paths:
    M Source/WebCore/page/InteractionRegion.cpp

  Log Message:
  -----------
  Fix assertion failure in InteractionRegion::isOverlay
https://bugs.webkit.org/show_bug.cgi?id=259598
<rdar://113037867>

Reviewed by Tim Horton.

We're not supposed to use `firstChildBox()` if the first child might be
of another type. Using `firstChild()` directly instead.

* Source/WebCore/page/InteractionRegion.cpp:
(WebCore::isOverlay):

Canonical link: https://commits.webkit.org/266395@main