<!DOCTYPE html>
<html>
<head>
  <style>
    #box {
        position: absolute;
        left: 0;
        top: 0;
        height: 100px;
        width: 100px;
        background-color: red;
        -webkit-transition: -webkit-transform 0.5s linear;
        -webkit-transform: translateX(0) scale(1);
    }
    
    #box.move {
        -webkit-transform: translateX(400px) scale(1);
    }

    #safezone {
        position: absolute;
        left: 0;
        top: 0;
        height: 100px;
        width: 300px;
        left: 100px;
        background-color: green;
    }
  </style>
  <script>
    if (window.testRunner)
        testRunner.waitUntilDone();
    
    function suspendAndWaitForCompletion()
    {
        if (window.internals)
            internals.suspendAnimations();

        window.setTimeout(function() {
            if (window.testRunner) {
                internals.resumeAnimations();
                testRunner.notifyDone();
            }
        }, 250);
    }
    
    function doTest()
    {
        document.getElementById('box').className = 'move';
        window.setTimeout(function() {
            // Wait for the box to animate into the safe zone (to test that it doesn't snap back to the start).
            window.setTimeout(suspendAndWaitForCompletion, 250);
        }, 0); // give the accelerated transition a chance to kick off.
    }

    window.addEventListener('load', doTest, false);
  </script>
</head>
<body>

<!-- When suspended, the red box should be hidden by the green box. You should see no red. -->
<div id="box"></div>
<div id="safezone"></div>

<div id="result"></div>

</body>
</html>