| Index: PerformanceTests/Layout/subtree-detaching.html | 
| diff --git a/PerformanceTests/Layout/subtree-detaching.html b/PerformanceTests/Layout/subtree-detaching.html | 
| index 3805f5e236cd7035e4436c8a53f21cc81ba43677..97abd503577a2f952760f566f2fcd91b02335b86 100644 | 
| --- a/PerformanceTests/Layout/subtree-detaching.html | 
| +++ b/PerformanceTests/Layout/subtree-detaching.html | 
| @@ -19,8 +19,7 @@ function buildTree() | 
|  | 
| function setup() { | 
| wrapper.style.display = "block"; | 
| -    // Force a layout so that everything is up-to-date. | 
| -    wrapper.offsetTop; | 
| +    PerfTestRunner.forceLayout(); | 
| } | 
|  | 
| function runTest() { | 
| @@ -29,7 +28,7 @@ function runTest() { | 
| var now = PerfTestRunner.now(); | 
|  | 
| wrapper.style.display = "none"; | 
| -    wrapper.offsetTop; | 
| +    PerfTestRunner.forceLayout(); | 
|  | 
| return PerfTestRunner.now() - now; | 
| } | 
|  |