[Webkit-unassigned] [Bug 212783] New: [Cocoa] CFPrefs synchronization does not always work for global preference changes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=212783

            Bug ID: 212783
           Summary: [Cocoa] CFPrefs synchronization does not always work
                    for global preference changes
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: pvollan at apple.com

In CFPrefs direct mode, synchronization of global preference changes from the UI process to the WebContent process does not always work. This is caused by the KVO notification being sent to the incorrect NSUserDefault object, which leads us to believe a non-global preference was changed. Since a global preference change always leads to some NSUserDefaults object receiving the notification, we can work around this by checking if the preference being changed really belongs to the domain of the NSUserDefaults object, or if it is a global preference.

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