[Webkit-unassigned] [Bug 249075] New: Check for promise before resolving in FullscreenManager::exitFullscreen()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=249075

            Bug ID: 249075
           Summary: Check for promise before resolving in
                    FullscreenManager::exitFullscreen()
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ntim at apple.com

The promise can be nullptr if called from the legacy fullscreen API (see DocumentFullscreen::webkitExitFullScreen), so we should check it's existence before trying to resolve.

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