<!DOCTYPE html>

<html>
<head>
    <style>
        iframe {
            width: 400px;
            height: 300px;
        }
        .composited {
            transform: translateZ(1px);
            padding: 10px;
            width: 500px;
        }

        .masked {
            -webkit-mask-image: url(../resources/alpha-gradient.png);
            -webkit-mask-repeat: repeat-x;
        }
    </style>
    <script>
        if (window.testRunner) {
            testRunner.dumpAsText();
            testRunner.waitUntilDone();
        }
        
        function geRemoveViewScript()
        {
            return `
            (function() {
                uiController.removeViewFromWindow(function() {
                    uiController.uiScriptComplete('');
                });
            })();`
        }
        
        function getReinsertViewScript()
        {
            return `
            (function() {
                uiController.addViewToWindow(function() {
                    uiController.uiScriptComplete('');
                });
            })();`
        }
        
        function getLayerTree()
        {
            if (window.internals)
                return internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_TILE_CACHES);
            
            return "";
        }

        function doTest()
        {
            if (!testRunner.runUIScript)
                return;

            let beforeLayers = getLayerTree();

            testRunner.runUIScript(geRemoveViewScript(), function(result) {
                
                    testRunner.runUIScript(getReinsertViewScript(), function(result) {
                        let afterLayers = getLayerTree();
                        
                        document.getElementById('before-layers').textContent = beforeLayers;
                        document.getElementById('after-layers').textContent = afterLayers;
                        
                        testRunner.notifyDone();
                    });
            });
        }
        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>
    <div class="composited">
        <iframe src="resources/composited-subframe.html"></iframe>
    </div>

<pre id="before-layers">Layer tree goes here</pre>
<pre id="after-layers">Layer tree goes here</pre>
</body>
</html>