Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 21d6c8734704cef281f0ad029e20ba409e434cc0
      
https://github.com/WebKit/WebKit/commit/21d6c8734704cef281f0ad029e20ba409e434cc0
  Author: Jer Noble <[email protected]>
  Date:   2026-04-23 (Thu, 23 Apr 2026)

  Changed paths:
    M Source/WebCore/html/HTMLMediaElement.cpp
    M Source/WebCore/html/HTMLMediaElement.h

  Log Message:
  -----------
  REGRESSION(311815@main): ASSERT in 
Document::addScreenPropertiesChangedObserver(), 
!m_screenPropertiesChangedObservers.contains(observer)
rdar://175436583
https://bugs.webkit.org/show_bug.cgi?id=313144

Reviewed by Andy Estes.

Ensure the ScreenPropertyChangedObserver is removed from the
HTMLMediaElement's document during unregisterWithDocument()
by making it a RefPtr and explicitly nulling it out, ensuring
the same observer is not added twice to the same document.

* Source/WebCore/html/HTMLMediaElement.cpp:
(WebCore::m_remote):
(WebCore::HTMLMediaElement::registerWithDocument):
(WebCore::HTMLMediaElement::unregisterWithDocument):
* Source/WebCore/html/HTMLMediaElement.h:

Canonical link: https://commits.webkit.org/311910@main



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