Fix language/stacktrace_rethrow_error_test_withtraceparameter_multi test

pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/operations.dart

Index: pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/operations.dart
diff --git a/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/operations.dart b/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/operations.dart
index bfcf9d6c7d006ec4d6c0c2d00a624e0a6182d149..61b7cd16064176a704a31bb77e5159f25b337b45 100644
--- a/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/operations.dart
+++ b/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/operations.dart
@@ -481,7 +481,7 @@ bool strongInstanceOf(obj, type, ignoreFromWhiteList) => JS(
     return true;
   }
   if (result === false) return false;
-  if (!$_ignoreWhitelistedErrors || ($ignoreFromWhiteList == void 0)) return result;
+  if (!dart.__ignoreWhitelistedErrors || ($ignoreFromWhiteList == void 0)) return result;

[Leaf, 2017/05/15 22:06:39]

line length?

[Jacob, 2017/05/15 23:27:49]

Done.

   if ($_ignoreTypeFailure(actual, $type)) return true;
   return result;
 })()''');
@@ -506,7 +506,7 @@ instanceOf(obj, type) => JS(
   }
   let result = $strongInstanceOf($obj, $type);
   if (result !== null) return result;
-  if (!$_failForWeakModeIsChecks) return false;
+  if (!dart.__failForWeakModeIsChecks) return false;
   let actual = $getReifiedType($obj);
   $throwStrongModeError('Strong mode is-check failure: ' +
     $typeName(actual) + ' does not soundly subtype ' +