Refactor BackendHelpers to be reusageable with KernelWorldBuilder

pkg/compiler/lib/src/ssa/codegen.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.
 
 import 'dart:math' as math;
 import '../common.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/tasks.dart' show CompilerTask;
 import '../compiler.dart' show Compiler;
 import '../constants/constant_system.dart';
@@ skipping 1619 matching lines @@
       js.Expression receiverExpression = pop();
       use(node.conditionalConstantInterceptor);
       js.Expression constant = pop();
       push(js.js('# && #', [receiverExpression, constant]));
     } else {
       assert(node.inputs.length == 1);
       registry.registerSpecializedGetInterceptor(node.interceptedClasses);
       js.Name name =
           backend.namer.nameForGetInterceptor(node.interceptedClasses);
       var isolate = new js.VariableUse(
-          backend.namer.globalObjectFor(helpers.interceptorsLibrary));
+          backend.namer.globalObjectForLibrary(helpers.interceptorsLibrary));
       use(node.receiver);
       List<js.Expression> arguments = <js.Expression>[pop()];
       push(js
           .propertyCall(isolate, name, arguments)
           .withSourceInformation(node.sourceInformation));
       registry.registerUseInterceptor();
     }
   }
 
   visitInvokeDynamicMethod(HInvokeDynamicMethod node) {
@@ skipping 44 matching lines @@
     push(js
         .propertyCall(object, methodName, arguments)
         .withSourceInformation(node.sourceInformation));
     registry.registerStaticUse(new StaticUse.constructorBodyInvoke(
         node.element, new CallStructure.unnamed(arguments.length)));
   }
 
   void visitOneShotInterceptor(HOneShotInterceptor node) {
     List<js.Expression> arguments = visitArguments(node.inputs);
     var isolate = new js.VariableUse(
-        backend.namer.globalObjectFor(helpers.interceptorsLibrary));
+        backend.namer.globalObjectForLibrary(helpers.interceptorsLibrary));
     Selector selector = node.selector;
     js.Name methodName = backend.registerOneShotInterceptor(selector);
     push(js
         .propertyCall(isolate, methodName, arguments)
         .withSourceInformation(node.sourceInformation));
     if (selector.isGetter) {
       registerGetter(node);
     } else if (selector.isSetter) {
       registerSetter(node);
     } else {
@@ skipping 1399 matching lines @@
     registry.registerStaticUse(new StaticUse.staticInvoke(
         helper, new CallStructure.unnamed(argumentCount)));
     return backend.emitter.staticFunctionAccess(helper);
   }
 
   @override
   void visitRef(HRef node) {
     visit(node.value);
   }
 }