Split RuntimesTypes into RuntimeTypes and RuntimeTypesEncoder

pkg/compiler/lib/src/js_backend/namer.dart

 // Copyright (c) 2011, 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 js_backend;
 
 /**
  * Assigns JavaScript identifiers to Dart variables, class-names and members.
  *
  * Names are generated through three stages:
@@ skipping 1705 matching lines @@
 
   @override
   void visitType(TypeConstantValue constant, [_]) {
     // Generates something like 'Type_String_k8F', using the simple name of the
     // type and a hash to disambiguate the same name in different libraries.
     addRoot('Type');
     DartType type = constant.representedType;
     String name = type.element?.name;
     if (name == null) {  // e.g. DartType 'dynamic' has no element.
       JavaScriptBackend backend = compiler.backend;
-      name = backend.rti.getTypeRepresentationForTypeConstant(type);
+      name = backend.rtiEncoder.getTypeRepresentationForTypeConstant(type);
     }
     addIdentifier(name);
     add(getHashTag(constant, 3));
   }
 
   @override
   void visitInterceptor(InterceptorConstantValue constant, [_]) {
     addRoot(constant.dispatchedType.element.name);
     add('methods');
   }
@@ skipping 100 matching lines @@
       hash = _combine(hash, _visit(value));
     }
     return hash;
   }
 
   @override
   int visitType(TypeConstantValue constant, [_]) {
     DartType type = constant.representedType;
     JavaScriptBackend backend = compiler.backend;
     // This name includes the library name and type parameters.
-    String name = backend.rti.getTypeRepresentationForTypeConstant(type);
+    String name = backend.rtiEncoder.getTypeRepresentationForTypeConstant(type);
     return _hashString(4, name);
   }
 
   @override
   int visitInterceptor(InterceptorConstantValue constant, [_]) {
     String typeName = constant.dispatchedType.element.name;
     return _hashString(5, typeName);
   }
 
   @override
@@ skipping 105 matching lines @@
 
   visit(DartType type, [_]) {
     type.accept(this, null);
   }
 
   visitType(DartType type, _) {
     sb.write(type.name);
   }
 
   visitFunctionType(FunctionType type, _) {
-    if (backend.rti.isSimpleFunctionType(type)) {
+    if (backend.rtiEncoder.isSimpleFunctionType(type)) {
       sb.write('args${type.parameterTypes.length}');
       return;
     }
     visit(type.returnType);
     sb.write('_');
     for (DartType parameter in type.parameterTypes) {
       sb.write('_');
       visit(parameter);
     }
     bool first = false;
@@ skipping 17 matching lines @@
       }
     }
   }
 }
 
 enum NamingScope {
   global,
   instance,
   constant
 }