Fix runtimeType.toString for tear-offs.

pkg/compiler/lib/src/js_emitter/old_emitter/setup_program_builder.dart

 // Copyright (c) 2013, 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.
 
 part of dart2js.js_emitter;
 
 // TODO(ahe): Share these with js_helper.dart.
 const FUNCTION_INDEX = 0;
 const NAME_INDEX = 1;
 const CALL_NAME_INDEX = 2;
 const REQUIRED_PARAMETER_INDEX = 3;
 const OPTIONAL_PARAMETER_INDEX = 4;
 const DEFAULT_ARGUMENTS_INDEX = 5;
 
 const bool VALIDATE_DATA = false;
 
 const RANGE1_SIZE = RANGE1_LAST - RANGE1_FIRST + 1;
 const RANGE2_SIZE = RANGE2_LAST - RANGE2_FIRST + 1;
 const RANGE1_ADJUST = - (FIRST_FIELD_CODE - RANGE1_FIRST);
 const RANGE2_ADJUST = - (FIRST_FIELD_CODE + RANGE1_SIZE - RANGE2_FIRST);
 const RANGE3_ADJUST =
     - (FIRST_FIELD_CODE + RANGE1_SIZE + RANGE2_SIZE - RANGE3_FIRST);
 
 const String setupProgramName ='setupProgram';
-// TODO(floitsch): make sure this property can't clash with anything. It's
-//   unlikely since it lives on types, but still.
-const String typeNameProperty = r'builtin$cls';
 
 jsAst.Statement buildSetupProgram(Program program, Compiler compiler,
                                 JavaScriptBackend backend,
                                 Namer namer,
                                 OldEmitter emitter) {
 
   jsAst.Expression typeInformationAccess =
       emitter.generateEmbeddedGlobalAccess(embeddedNames.TYPE_INFORMATION);
   jsAst.Expression globalFunctionsAccess =
       emitter.generateEmbeddedGlobalAccess(embeddedNames.GLOBAL_FUNCTIONS);
@@ skipping 194 matching lines @@
         var field = generateAccessor(fields[i], accessors, name);
         if (#hasIsolateSupport) { fieldNames += "'" + field + "',"; }
         var parameter = "p_" + field;
         str += parameter;
         body += ("this." + field + " = " + parameter + ";\\n");
       }
       if (supportsDirectProtoAccess) {
         body += "this." + #deferredActionString + "();";
       }
       str += ") {\\n" + body + "}\\n";
-      str += name + ".$typeNameProperty=\\"" + name + "\\";\\n";
       str += "\$desc=\$collectedClasses." + name + "[1];\\n";
       str += name + ".prototype = \$desc;\\n";
       if (typeof defineClass.name != "string") {
+        // IE does not store the name, but allows to modify the property.
         str += name + ".name=\\"" + name + "\\";\\n";
       }
       if (#hasIsolateSupport) {
         str += name + "." + #fieldNamesProperty + "=[" + fieldNames
                + "];\\n";
       }
       str += accessors.join("");
 
       return str;
     }
@@ skipping 589 matching lines @@
 (function() {
   var result = $array[$index];
   if ($check) {
     throw new Error(
         name + ": expected value of type \'$type\' at index " + ($index) +
         " but got " + (typeof result));
   }
   return result;
 })()''';
 }