Implement select listbox using shadow DOM

LayoutTests/fast/forms/select-clientheight-large-size.html

Index: LayoutTests/fast/forms/select-clientheight-large-size.html
diff --git a/LayoutTests/fast/forms/select-clientheight-large-size.html b/LayoutTests/fast/forms/select-clientheight-large-size.html
index 80d9c357a0418197594793a973fe3fe41dab96ba..e20d25ea27db3a3e5ab320f52a1b161841da03b2 100644
--- a/LayoutTests/fast/forms/select-clientheight-large-size.html
+++ b/LayoutTests/fast/forms/select-clientheight-large-size.html
@@ -12,10 +12,6 @@
         return getElemById(elemId).clientHeight;
     }
 
-    function multipleOfElement(elemId, multiple) {
-        return clientHeight(elemId) * multiple + (multiple - 1);
-    }
-
     function addSelect(id, numOptions)
     {
         var select = document.createElement("select2");
@@ -31,7 +27,4 @@
     shouldBe("clientHeight('select2')", "clientHeight('select1')");
     shouldBeTrue("getElemById('select2').setAttribute('size', '4'); clientHeight('select2') == clientHeight('select1')");
     shouldBeTrue("getElemById('select2').setAttribute('size', '5'); clientHeight('select2') > clientHeight('select1')");
-    shouldBeTrue("getElemById('select2').setAttribute('size', '8'); clientHeight('select2') == multipleOfElement('select1', 2)");
-    shouldBeTrue("getElemById('select2').setAttribute('size', '12'); clientHeight('select2') == multipleOfElement('select1', 3)");
-    shouldBeTrue("getElemById('select2').setAttribute('size', '16'); clientHeight('select2') == multipleOfElement('select1', 4)");
 </script>