Add some ArgumentError and RangeError constructors that capture more information.

tests/corelib/queue_test.dart

Index: tests/corelib/queue_test.dart
diff --git a/tests/corelib/queue_test.dart b/tests/corelib/queue_test.dart
index e590dce63142ad74463610464bb39e4891e45705..cb4f2c7634857bd32b5760b7e82db4b257bbf0cf 100644
--- a/tests/corelib/queue_test.dart
+++ b/tests/corelib/queue_test.dart
@@ -260,6 +260,11 @@ abstract class QueueTest {
     Expect.equals(N, queue.length);
     Expect.isFalse(queue.isEmpty);
 
+    Expect.equals(0, queue.elementAt(0));
+    Expect.equals(N - 1, queue.elementAt(N - 1));
+    Expect.throws(() { queue.elementAt(-1); });
+    Expect.throws(() { queue.elementAt(N); });
+
     Iterable skip1 = queue.skip(1);
     Iterable take1 = queue.take(1);
     Iterable mapped = queue.map((e) => -e);