dart2js: add initial support for lookup-maps

pkg/compiler/lib/src/common/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.
 
 library dart2js.common.codegen;
 
 import '../compiler.dart' show
     Compiler;
 import '../constants/values.dart' show
     ConstantValue;
@@ skipping 94 matching lines @@
     world.registerFieldSetter(element);
   }
 
   void registerIsCheck(DartType type) {
     world.registerIsCheck(type);
     backend.registerIsCheckForCodegen(type, world, this);
   }
 
   void registerCompileTimeConstant(ConstantValue constant) {
     backend.registerCompileTimeConstant(constant, this);
-    backend.constants.addCompileTimeConstantForEmission(constant);
   }
 
   void registerTypeVariableBoundsSubtypeCheck(DartType subtype,
                                               DartType supertype) {
     backend.registerTypeVariableBoundsSubtypeCheck(subtype, supertype);
   }
 
   void registerInstantiatedClosure(LocalFunctionElement element) {
     backend.registerInstantiatedClosure(element, this);
   }
@@ skipping 13 matching lines @@
   void registerSpecializedGetInterceptor(Set<ClassElement> classes) {
     backend.registerSpecializedGetInterceptor(classes);
   }
 
   void registerUseInterceptor() {
     backend.registerUseInterceptor(world);
   }
 
   void registerTypeConstant(ClassElement element) {
     backend.customElementsAnalysis.registerTypeConstant(element, world);
+    backend.lookupMapAnalysis.registerTypeConstant(element);
   }
 
   void registerStaticInvocation(Element element) {
     world.registerStaticUse(element);
   }
 
   void registerSuperInvocation(Element element) {
     world.registerStaticUse(element);
   }
 
@@ skipping 38 matching lines @@
 
   TreeElements get resolutionTree => element.resolvedAst.elements;
 
   WorldImpact run(Compiler compiler, CodegenEnqueuer world) {
     if (world.isProcessed(element)) return const WorldImpact();
 
     registry = new CodegenRegistry(compiler, resolutionTree);
     return compiler.codegen(this, world);
   }
 }