Fix a bad merge that lead to unused optimization: implement the dataEquals in HInterceptor in order…

tests/language/interceptor3_test.dart

+// Copyright (c) 2012, 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.
+
+// Test that code motion in the presence of interceptors work in dart2js.
+
+main() {
+  var a = [2, '2'];
+  var b = a[1];
+  if (a[0] == 2 && b is String) {
+    Expect.isTrue(b.contains('2'));
+  } else {
+    b.isEven();
+  }
+}