[webkit-changes] [WebKit/WebKit] 3a9894: Revert part of 258887 at main

[EWS]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 3a98940090fc6917c074396bf5a2b47a80b31609
      https://github.com/WebKit/WebKit/commit/3a98940090fc6917c074396bf5a2b47a80b31609
  Author: Alex Christensen <achristensen at webkit.org>
  Date:   2023-01-13 (Fri, 13 Jan 2023)

  Changed paths:
    M Source/WebKit/UIProcess/ProvisionalFrameProxy.cpp

  Log Message:
  -----------
  Revert part of 258887 at main
https://bugs.webkit.org/show_bug.cgi?id=250596

Unreviewed.

There was a point at which merging that PR would not introduce assertions to the
SiteIsolation API tests, but merging it introduced assertions.  This partial revert
fixes the tests while keeping infrastructure so I can continue to develop drawing
site isolated iframes.

* Source/WebKit/UIProcess/ProvisionalFrameProxy.cpp:
(WebKit::ProvisionalFrameProxy::ProvisionalFrameProxy):

Canonical link: https://commits.webkit.org/258893@main