dart2js: Split TypeTestEmitter into a registry and an emitter.

pkg/compiler/lib/src/js_emitter/old_emitter/class_emitter.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;
 
 class ClassEmitter extends CodeEmitterHelper {
 
   ClassStubGenerator get _stubGenerator =>
       new ClassStubGenerator(compiler, namer, backend);
 
   /**
    * Documentation wanted -- johnniwinther
    *
    * Invariant: [classElement] must be a declaration element.
    */
   void generateClass(ClassElement classElement,
                      ClassBuilder properties,
                      Map<String, jsAst.Expression> additionalProperties) {
     final onlyForRti =
-        emitter.typeTestEmitter.rtiNeededClasses.contains(classElement);
+        emitter.typeTestRegistry.rtiNeededClasses.contains(classElement);
 
     assert(invariant(classElement, classElement.isDeclaration));
     assert(invariant(classElement, !classElement.isNative || onlyForRti));
 
     emitter.needsDefineClass = true;
     String className = namer.getNameOfClass(classElement);
 
     ClassElement superclass = classElement.superclass;
     String superName = "";
     if (superclass != null) {
@@ skipping 568 matching lines @@
           js(r'this.$builtinTypeInfo && this.$builtinTypeInfo[#]', index);
     }
     jsAst.Expression convertRtiToRuntimeType =
         namer.elementAccess(backend.findHelper('convertRtiToRuntimeType'));
     compiler.dumpInfoTask.registerElementAst(element,
         builder.addProperty(name,
             js('function () { return #(#) }',
                 [convertRtiToRuntimeType, computeTypeVariable])));
   }
 }