Add TypeUse.

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 '../common.dart';
 import '../compiler.dart' show
     Compiler;
 import '../constants/values.dart' show
     ConstantValue;
 import '../dart_types.dart' show
     DartType,
     InterfaceType;
 import '../elements/elements.dart' show
     AstElement,
     ClassElement,
     Element,
     FunctionElement,
     LocalFunctionElement;
 import '../enqueue.dart' show
     CodegenEnqueuer;
 import '../resolution/tree_elements.dart' show
     TreeElements;
 import '../universe/use.dart' show
     DynamicUse,
-    StaticUse;
+    StaticUse,
+    TypeUse;
 import '../universe/world_impact.dart' show
     WorldImpact,
     WorldImpactBuilder;
 import '../util/util.dart' show
     Pair,
     Setlet;
 import 'registry.dart' show
     Registry,
     EagerRegistry;
 import 'work.dart' show
@@ skipping 144 matching lines @@
 
   void registerStaticUse(StaticUse staticUse) {
     worldImpact.registerStaticUse(staticUse);
   }
 
   void registerDynamicUse(DynamicUse dynamicUse) {
     worldImpact.registerDynamicUse(dynamicUse);
     compiler.dumpInfoTask.elementUsesSelector(currentElement, dynamicUse);
   }
 
-  void registerIsCheck(DartType type) {
-    worldImpact.registerIsCheck(type);
+  void registerTypeUse(TypeUse typeUse) {
+    worldImpact.registerTypeUse(typeUse);
   }
 
   void registerCompileTimeConstant(ConstantValue constant) {
     worldImpact.registerCompileTimeConstant(constant);
   }
 
   void registerTypeVariableBoundsSubtypeCheck(DartType subtype,
                                               DartType supertype) {
     worldImpact.registerTypeVariableBoundsSubtypeCheck(subtype, supertype);
   }
@@ skipping 12 matching lines @@
 
   void registerUseInterceptor() {
     worldImpact.registerUseInterceptor();
   }
 
   void registerTypeConstant(ClassElement element) {
     worldImpact.registerTypeConstant(element);
   }
 
   void registerInstantiation(InterfaceType type) {
-    worldImpact.registerInstantiatedType(type);
+    registerTypeUse(new TypeUse.instantiation(type));
   }
 
   void registerAsyncMarker(FunctionElement element) {
     worldImpact.registerAsyncMarker(element);
   }
 }
 
 /// [WorkItem] used exclusively by the [CodegenEnqueuer].
 class CodegenWorkItem extends WorkItem {
   CodegenRegistry registry;
@@ skipping 21 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, element);
     return compiler.codegen(this, world);
   }
 }