Fix modulo and bitwise operators.

test/browser/language_tests.js

 // Copyright (c) 2015, 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.
 
 (function() {
   'use strict';
 
   let dart_sdk = dart_library.import('dart_sdk');
   dart_sdk._isolate_helper.startRootIsolate(function() {}, []);
   let async_helper = dart_library.import('async_helper').async_helper;
 
   // TODO(jmesserly): separate StrongModeError from other errors.
   let status = {
     expectedFailures: new Set([
       'arithmetic2_test',
       'assert_with_type_test_or_cast_test',
       'assertion_test',
       'async_star_await_pauses_test',
       'async_star_cancel_while_paused_test',
       'async_star_regression_fisk_test',
       'async_switch_test',
       'asyncstar_throw_in_catch_test',
       'await_future_test',
       'bit_operations_test_none_multi',
       'bit_shift_test',
       'bool_test',
       'bound_closure_equality_test',
+      'branch_canonicalization_test',  // JS bit operations truncate to 32 bits.
       'call_closurization_test',
       'call_function_apply_test',
       'call_operator_test',
       'call_property_test',
       'call_test',
       'call_this_test',
       'call_through_null_getter_test',
       'call_with_no_such_method_test',
       'canonical_const2_test',
       'canonical_const_test',
@@ skipping 367 matching lines @@
   }
 
   (dart_library.import('async_await_test_none_multi')
       .async_await_test_none_multi.main());
   // TODO(vsm): Re-enable.
   // See https://github.com/dart-lang/dev_compiler/issues/456
   // (dart_library.import('async_star_test_none_multi')
   //     .async_star_test_none_multi.main());
 
 })();