dart2js: refactor nsm_emitter.

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.
  */
 class Namer implements ClosureNamer {
@@ skipping 271 matching lines @@
         popularNameCounters = new Map<String, int>(),
         constantNames = new Map<ConstantValue, String>(),
         constantLongNames = new Map<ConstantValue, String>(),
         constantHasher = new ConstantCanonicalHasher(compiler),
         functionTypeNamer = new FunctionTypeNamer(compiler);
 
   JavaScriptBackend get backend => compiler.backend;
 
   String get isolateName => 'Isolate';
   String get isolatePropertiesName => r'$isolateProperties';
+  String get noSuchMethodName => publicInstanceMethodNameByArity(
+      Compiler.NO_SUCH_METHOD, Compiler.NO_SUCH_METHOD_ARG_COUNT);
   /**
    * Some closures must contain their name. The name is stored in
    * [STATIC_CLOSURE_NAME_NAME].
    */
   String get STATIC_CLOSURE_NAME_NAME => r'$name';
   String get closureInvocationSelectorName => Compiler.CALL_OPERATOR_NAME;
   bool get shouldMinify => false;
 
   String getNameForJsGetName(Node node, String name) {
     switch (name) {
@@ skipping 1114 matching lines @@
         if (!first) {
           sb.write('_');
         }
         sb.write('_');
         visit(parameter);
         first = true;
       }
     }
   }
 }