[Webkit-unassigned] [Bug 257241] New: [Cocoa] Call [AVCaptureDevice ensureServerConnection] when new extensions are made to the GPU Process

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=257241

            Bug ID: 257241
           Summary: [Cocoa] Call [AVCaptureDevice ensureServerConnection]
                    when new extensions are made to the GPU Process
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bfulgham at webkit.org
                CC: kkinnunen at apple.com

Our current code only calls [AVCaptureDevice ensureServerConnection] the first time we extend the sandbox. This can lead to problems if the user visits a site that only needs Microphone access (for example), and then visits a site that needs Camera access. Because the camera-related extensions are only recognized by the video capture system when [AVCaptureDevice ensureServiceConnection] is called, the fact that we called it before the new sandbox extensions were in place mean we never activate the relevant features.

To fix this, we should simply call [AVCaptureDevice ensureServerConnection] any time we extend the sandbox. I have confirmed with the relevant teams that this call is low-cost (performance wise), and is not harmful to call repeatedly for things that have already been activated.

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