Split RuntimesTypes into RuntimeTypes and RuntimeTypesEncoder

pkg/compiler/lib/src/js_emitter/program_builder/program_builder.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.
 
 library dart2js.js_emitter.program_builder;
 
 import '../js_emitter.dart' show computeMixinClass, Emitter;
 import '../model.dart';
 
 import '../../common.dart';
@@ skipping 620 matching lines @@
         isClosureCallMethod: isClosureCallMethod, aliasName: aliasName,
         canBeApplied: canBeApplied, canBeReflected: canBeReflected,
         requiredParameterCount: requiredParameterCount,
         optionalParameterDefaultValues: optionalParameterDefaultValues,
         functionType: functionType);
   }
 
   js.Expression _generateFunctionType(DartType type, OutputUnit outputUnit) {
     if (type.containsTypeVariables) {
       js.Expression thisAccess = js.js(r'this.$receiver');
-      return backend.rti.getSignatureEncoding(type, thisAccess);
+      return backend.rtiEncoder.getSignatureEncoding(type, thisAccess);
     } else {
       return backend.emitter.metadataCollector
           .reifyTypeForOutputUnit(type, outputUnit);
     }
   }
 
   List<ParameterStubMethod> _generateParameterStubs(MethodElement element,
                                                     bool canTearOff) {
 
     if (!_methodNeedsStubs(element)) return const <ParameterStubMethod>[];
@@ skipping 177 matching lines @@
       Constant constant = new Constant(name, holder, constantValue);
       _constants[constantValue] = constant;
     }
   }
 
   Holder _registerStaticStateHolder() {
     return _registry.registerHolder(
         namer.staticStateHolder, isStaticStateHolder: true);
   }
 }