dart2js: Pass type information to constructor rather than add later.

pkg/compiler/lib/src/js_emitter/runtime_type_generator.dart

 // Copyright (c) 2014, 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;
 
 // Function signatures used in the generation of runtime type information.
 typedef void FunctionTypeSignatureEmitter(
     Element method, FunctionType methodType);
 
@@ skipping 294 matching lines @@
   StubMethod _generateTypeVariableReader(
       ClassElement cls, TypeVariableElement element) {
     jsAst.Name name = namer.nameForReadTypeVariable(element);
     int index = element.index;
     jsAst.Expression computeTypeVariable;
 
     Substitution substitution =
         backend.rti.getSubstitution(cls, element.typeDeclaration);
     if (substitution != null) {
       computeTypeVariable = js(
-          r'#.apply(null, this.$builtinTypeInfo)',
+          r'#.apply(null, this.$ti)',
           backend.rtiEncoder
               .getSubstitutionCodeForVariable(substitution, index));
     } else {
       // TODO(ahe): These can be generated dynamically.
       computeTypeVariable = js(
-          r'this.$builtinTypeInfo && this.$builtinTypeInfo[#]',
+          r'this.$ti && this.$ti[#]',
           js.number(index));
     }
     jsAst.Expression convertRtiToRuntimeType = backend.emitter
         .staticFunctionAccess(backend.helpers.convertRtiToRuntimeType);
 
     return new StubMethod(
         name,
         js('function () { return #(#) }',
             [convertRtiToRuntimeType, computeTypeVariable]));
   }
 }