Add failing tests for dart2js' range-analysis.

tests/language/value_range_test.dart

Index: tests/language/value_range_test.dart
diff --git a/tests/compiler/dart2js_extra/constant_javascript_semantics2_test.dart b/tests/language/value_range_test.dart
similarity index 50%
copy from tests/compiler/dart2js_extra/constant_javascript_semantics2_test.dart
copy to tests/language/value_range_test.dart
index af4872fd2b066b46cfd00062dfb04b78f0bc6771..f5a049192bf83ab76155cbad695a10fadb20d5c0 100644
--- a/tests/compiler/dart2js_extra/constant_javascript_semantics2_test.dart
+++ b/tests/language/value_range_test.dart
@@ -2,24 +2,19 @@
 // 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.
 
-// Make sure we use JavaScript semantics when compiling compile-time constants.
-// In this case we test that the value-range analysis uses JavaScript semantics
-// too.
-
 int inscrutable(int x) => x == 0 ? 0 : x | inscrutable(x & (x - 1));
 
 foo() {
-  var a = const [1, 2];
-  var i = 0x100000000;
-  if (inscrutable(i) == 0) {
-    i = 0x100000001;
-  }
-  i = 0xFFFFFFFFF & i;  // In JS semantics [:i:] will be truncated to 32 bits.
-  i = 0x100000001 - i;
-  return a[i];
+  var x = 0x102;
+  if (inscrutable(x) == 0) x = 0x0;
+  if (inscrutable(10) == 10) x = 0x10;  // x is in range [0 .. 0x102].
+  x = x & 0xFF;  // x should be in range [0 .. 0xFF]. Actual value: 0x10.
+  var a = const [1, 2, 3];
+  return a[x];
 }
 
 main() {
   Expect.throws(() => foo(),
                 (e) => e is IndexOutOfRangeException);
 }
+