| Index: LayoutTests/compositing/will-change/gpu-rasterization-hint-suppresses-compositing.html | 
| diff --git a/LayoutTests/compositing/will-change/gpu-rasterization-hint-suppresses-compositing.html b/LayoutTests/compositing/will-change/gpu-rasterization-hint-suppresses-compositing.html | 
| new file mode 100644 | 
| index 0000000000000000000000000000000000000000..a18b6d885439944e46d05bc9db7757e7dd0c7740 | 
| --- /dev/null | 
| +++ b/LayoutTests/compositing/will-change/gpu-rasterization-hint-suppresses-compositing.html | 
| @@ -0,0 +1,92 @@ | 
| +<!DOCTYPE html> | 
| +<html> | 
| +<head> | 
| +  <style> | 
| +     #container { | 
| +       will-change: contents; | 
| +       z-index: 0; | 
| +       position: absolute; | 
| +       top: 0px; | 
| +       left: 0px; | 
| +     } | 
| + | 
| +    .shouldNotComposite { | 
| +      position: absolute; | 
| +      width: 50px; | 
| +      height: 50px; | 
| +      background-color: blue; | 
| +    } | 
| + | 
| +    #willChangeOpacity { | 
| +      will-change: opacity; | 
| +      top: 0px; | 
| +      left: 0px; | 
| +    } | 
| + | 
| +    #willChangeContents { | 
| +      will-change: contents; | 
| +      top: 0px; | 
| +      left: 60px; | 
| +    } | 
| + | 
| +    #willChangeTop { | 
| +      will-change: top; | 
| +      top: 0px; | 
| +      left: 120px; | 
| +    } | 
| + | 
| +    #willChangeTransform { | 
| +      will-change: -webkit-transform; | 
| +      top: 60px; | 
| +      left: 0px; | 
| +    } | 
| + | 
| +    #animateOpacity { | 
| + | 
| +      top: 60px; | 
| +      left: 60px; | 
| +      -webkit-animation: fade-in-out 0.1s linear infinite alternate; | 
| +    } | 
| + | 
| +    @-webkit-keyframes fade-in-out { from { opacity: 0.3; } to { opacity: 0.9; } } | 
| + | 
| +  </style> | 
| + | 
| +  <script> | 
| +    if (window.internals) { | 
| +      window.internals.settings.setAcceleratedCompositingForGpuRasterizationHintEnabled(true); | 
| +      window.internals.settings.setAcceleratedCompositingForAnimationEnabled(true); | 
| +      // Force an update of the compositing triggers. | 
| +      window.internals.forceCompositingUpdate(document); | 
| +    } | 
| + | 
| +    if (window.testRunner) { | 
| +      testRunner.dumpAsText(); | 
| +      testRunner.waitUntilDone(); | 
| +    } | 
| + | 
| +    function animationEventListener() { | 
| +      if (window.testRunner) { | 
| +        document.getElementById("layertree").innerText = window.internals.layerTreeAsText(document); | 
| +        testRunner.notifyDone(); | 
| +      } | 
| +    } | 
| + | 
| +    window.addEventListener('load', function() { | 
| +      document.getElementById("animateOpacity").addEventListener('webkitAnimationIteration', animationEventListener); | 
| +    }, false); | 
| +  </script> | 
| +</head> | 
| +<body> | 
| +  <div id="container"> | 
| +    <div id="willChangeOpacity" class="shouldNotComposite"> | 
| +      <div id="willChangeTransform" class="shouldNotComposite"></div> | 
| +    </div> | 
| +    <div id="willChangeContents" class="shouldNotComposite"></div> | 
| +    <div id="willChangeTop" class="shouldNotComposite"></div> | 
| +    <div id="animateOpacity" class="shouldNotComposite"></div> | 
| +  </div> | 
| + | 
| +  <pre id="layertree"></pre> | 
| +</body> | 
| +</html> | 
|  |