Remove display() from more layout tests

LayoutTests/fast/layers/layer-content-visibility-change.html

Index: LayoutTests/fast/layers/layer-content-visibility-change.html
diff --git a/LayoutTests/fast/layers/layer-content-visibility-change.html b/LayoutTests/fast/layers/layer-content-visibility-change.html
index 89d8be9201f0f3554bafabec5020c62d93a4e751..65acf97ef15e9d7dab0747357978e2d59a7d7c6f 100644
--- a/LayoutTests/fast/layers/layer-content-visibility-change.html
+++ b/LayoutTests/fast/layers/layer-content-visibility-change.html
@@ -4,15 +4,13 @@
         <div id="inner" style="width: 100px; height: 100px; background-color: green;"></div>
     </div>
 </div>
+<script src="../../resources/run-after-display.js"></script>
 <script>
-    function test()
-    {
+    if (window.testRunner)
+        testRunner.waitUntilDone();
+    runAfterDisplay(function() {
         document.getElementById("inner").style.visibility = "visible";
-    }
-    if (window.testRunner) {
-        document.body.offsetTop;
-        testRunner.display();
-        test();
-    } else
-        setTimeout(test, 0);
+        if (window.testRunner)
+            testRunner.notifyDone();
+    });
 </script>