[webkit-changes] [WebKit/WebKit] 6ddef9: Fix Mach lookup sandbox violation

[Per Arne Vollan]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 6ddef9aeb82883b3ae144b1118b37cb5fe8a7b7f
      https://github.com/WebKit/WebKit/commit/6ddef9aeb82883b3ae144b1118b37cb5fe8a7b7f
  Author: Per Arne Vollan <pvollan at apple.com>
  Date:   2022-11-03 (Thu, 03 Nov 2022)

  Changed paths:
    M Source/WebKit/WebProcess/WebPage/WebPage.cpp

  Log Message:
  -----------
  Fix Mach lookup sandbox violation
https://bugs.webkit.org/show_bug.cgi?id=247260
rdar://100948504

Reviewed by Brent Fulgham.

Fix Mach lookup sandbox violation of containermanager in the WebContent process. To avoid this violation, we need to
set the cached value of 'allowsDeprecatedSynchronousXMLHttpRequestDuringUnload' from the UI process before reading it,
since getting this default value requires access to the containermanager service.

* Source/WebKit/WebProcess/WebPage/WebPage.cpp:
(WebKit::m_appHighlightsVisible):

Canonical link: https://commits.webkit.org/256292@main