Fix test to use developer mode. DartC does not have to check arguments to native methods.

tests/language/src/MathTest.dart

Index: tests/language/src/MathTest.dart
===================================================================
--- tests/language/src/MathTest.dart	(revision 505)
+++ tests/language/src/MathTest.dart	(working copy)
@@ -1,41 +0,0 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-// Tests weird cornercases of class Math.
-// An exception is thrown either by the type checker (development mode) or by
-// library (default mode).
-
-class FakeNumber {
-  const FakeNumber();
-  void toDouble() {}
-}
-
-class MathTest {
-  static bool testParseInt(x) {
-    try {
-      Math.parseInt(x);
-      return true;
-    } catch (var e) {
-      print(e);
-      return false;
-    }
-  }
-
-  static bool testSqrt(x) {
-    try {
-      Math.sqrt(x);
-      return true;
-    } catch (var e) {
-      print(e);
-      return false;
-    }
-  }
-
-  static void testMain() {
-    Expect.equals(false, testParseInt(5));
-    Expect.equals(false, testSqrt(const FakeNumber()));
-  }
-}
-main() {
-  MathTest.testMain();
-}