Share more logic between the Ssa(Ast)Builder and SsaKernelBuilder

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 'dart:io';
 import 'dart:convert' show JSON;
 
 import '../../closure.dart' show ClosureTask, ClosureFieldElement;
@@ skipping 81 matching lines @@
   final RuntimeTypesNeed _rtiNeed;
   final MirrorsData _mirrorsData;
   final InterceptorData _interceptorData;
   final SuperMemberData _superMemberData;
   final RuntimeTypesChecks _rtiChecks;
   final RuntimeTypesEncoder _rtiEncoder;
   final RuntimeTypesSubstitutions _rtiSubstitutions;
   final JsInteropAnalysis _jsInteropAnalysis;
   final OneShotInterceptorData _oneShotInterceptorData;
   final CustomElementsCodegenAnalysis _customElementsCodegenAnalysis;
-  final Map<MemberElement, js.Expression> _generatedCode;
+  final Map<MemberEntity, js.Expression> _generatedCode;
   final Namer _namer;
   final CodeEmitterTask _task;
   final ClosedWorld _closedWorld;
 
   /// Contains the collected information the program builder used to build
   /// the model.
   // The collector will be filled on the first call to `buildProgram`.
   // It is stored and publicly exposed for backwards compatibility. New code
   // (and in particular new emitters) should not use it.
   final Collector collector;
@@ skipping 1061 matching lines @@
       Constant constant = new Constant(name, holder, constantValue);
       _constants[constantValue] = constant;
     }
   }
 
   Holder _registerStaticStateHolder() {
     return _registry.registerHolder(_namer.staticStateHolder,
         isStaticStateHolder: true);
   }
 }