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#if PLATFORM(COCOA) && ENABLE(GPU_PROCESS) && ENABLE(MEDIA_STREAM)

messages -> RemoteSampleBufferDisplayLayerManager WantsAsyncDispatchMessage {
    CreateLayer(WebKit::SampleBufferDisplayLayerIdentifier id, bool hideRootLayer, WebCore::IntSize size) -> (Optional<WebKit::LayerHostingContextID> contextID) Async
    ReleaseLayer(WebKit::SampleBufferDisplayLayerIdentifier id)
}

#endif