Make Range.detach() a no-op

LayoutTests/fast/dom/Range/range-isPointInRange.html

Index: LayoutTests/fast/dom/Range/range-isPointInRange.html
diff --git a/LayoutTests/fast/dom/Range/range-isPointInRange.html b/LayoutTests/fast/dom/Range/range-isPointInRange.html
index 00c955ad787d2b8f52d860212b7c502c3e9e1123..d3480e0989cfca946ecadbc6722a3653f0cb2375 100644
--- a/LayoutTests/fast/dom/Range/range-isPointInRange.html
+++ b/LayoutTests/fast/dom/Range/range-isPointInRange.html
@@ -60,14 +60,12 @@ function test()
         document.getElementById("test8").innerHTML = "test 8 passed"; 
         
     // test 9 - detached range, attached node
-    // firefox throws an exception and does not return a value
+    expectedResult = false;
     var detachedRange = document.createRange();
-    detachedRange.detach();
-    try {
-        result = detachedRange.isPointInRange(document.getElementById("a1"), 0);
-    } catch (e) {
+    detachedRange.detach(); // No-op.
+    result = detachedRange.isPointInRange(document.getElementById("a1"), 0);
+    if (result == expectedResult)
         document.getElementById("test9").innerHTML = "test 9 passed"; 
-    }
         
     // test 10 - attached range, detached node
     // firefox does not throw an exception and returns false for this test