Re-apply "Implement operator== and hashCode for bound closures."

sdk/lib/_internal/compiler/implementation/js_backend/emitter_no_eval.dart

 // Copyright (c) 2012, 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;
 
 class CodeEmitterNoEvalTask extends CodeEmitterTask {
   CodeEmitterNoEvalTask(Compiler compiler,
                         Namer namer,
                         bool generateSourceMap)
       : super(compiler, namer, generateSourceMap);
 
   bool get getterAndSetterCanBeImplementedByFieldSpec => false;
   bool get generateTrivialNsmHandlers => false;
 
   void emitSuper(String superName, ClassBuilder builder) {
     if (superName != '') {
       builder.addProperty('super', js.string(superName));
     }
   }
 
   void emitRuntimeName(String runtimeName, ClassBuilder builder) {
     if (runtimeName != null) {
       builder.addProperty(r'$name', js.string(runtimeName));
     }
   }
 
-  void emitBoundClosureClassHeader(String mangledName,
-                                   String superName,
-                                   List<String> fieldNames,
-                                   ClassBuilder builder) {
+  void emitClosureClassHeader(String mangledName,
+                              String superName,
+                              List<String> fieldNames,
+                              ClassBuilder builder) {
     builder.addProperty('', buildConstructor(mangledName, fieldNames));
     emitSuper(superName, builder);
   }
 
 
   bool emitClassFields(ClassElement classElement,
                        ClassBuilder builder,
                        String superName,
                        { bool classIsNative: false }) {
     // Class fields are dynamically generated so they have to be
@@ skipping 127 matching lines @@
         makeGetter(1),
         makeGetter(0)];
 
     return js(ref(backend.initializeDispatchPropertyMethod))([
         js.fun(['a'], [ js('${ref(backend.getDispatchPropertyMethod)} = a')]),
         new jsAst.ArrayInitializer.from(getters),
         js('${ref(backend.jsInterceptorClass)}.prototype')
       ]);
   }
 }