Fix bad precedence for >>> operator.

tests/language/positive_bit_operations_test.dart

Index: tests/language/positive_bit_operations_test.dart
diff --git a/tests/language/positive_bit_operations_test.dart b/tests/language/positive_bit_operations_test.dart
index 730d5cf861c4dc8aae742637527693e44889600d..86af1a1586a4d76f9fe94a43619bd0e57f6e956d 100644
--- a/tests/language/positive_bit_operations_test.dart
+++ b/tests/language/positive_bit_operations_test.dart
@@ -108,8 +108,17 @@ speculative() {
   }
 }
 
+// Due to bad precedence rules this example was broken in Dart2Js.
+precedence() {
+  Expect.equals(0x80000000, -1 & 0x80000000);
+  Expect.equals(0x80000000, id(-1) & 0x80000000);
+  Expect.equals(0x80000000, ~(~(0x80000000)));
+  Expect.equals(0x80000000, ~(~(id(0x80000000))));
+}
+
 main() {
   constants();
   interceptors();
   speculative();
+  precedence();
 }