dart2js cps: Support inlining constructors with type arguments.

pkg/compiler/lib/src/js_backend/codegen/codegen.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 code_generator;
 
 import 'glue.dart';
 
 import '../../closure.dart' show
     ClosureClassElement;
@@ skipping 796 matching lines @@
     accumulator.add(new js.Try(tryBlock, catchPart, null));
   }
 
   @override
   js.Expression visitCreateBox(tree_ir.CreateBox node) {
     return new js.ObjectInitializer(const <js.Property>[]);
   }
 
   @override
   js.Expression visitCreateInstance(tree_ir.CreateInstance node) {
-    ClassElement classElement = node.classElement;
-    // TODO(asgerf): To allow inlining of InvokeConstructor, CreateInstance must
-    //               carry a DartType so we can register the instantiated type
-    //               with its type arguments. Otherwise dataflow analysis is
-    //               needed to reconstruct the instantiated type.
-    registry.registerInstantiation(classElement.rawType);
+    ClassElement classElement = node.dartType.element;
+    registry.registerInstantiation(node.dartType);
     if (classElement is ClosureClassElement) {
       registry.registerInstantiatedClosure(classElement.methodElement);
     }
     js.Expression instance = new js.New(
         glue.constructorAccess(classElement),
         visitExpressionList(node.arguments))
         .withSourceInformation(node.sourceInformation);
 
     List<tree_ir.Expression> typeInformation = node.typeInformation;
     assert(typeInformation.isEmpty ||
@@ skipping 392 matching lines @@
   void registerDefaultParameterValues(ExecutableElement element) {
     if (element is! FunctionElement) return;
     FunctionElement function = element;
     if (function.isStatic) return; // Defaults are inlined at call sites.
     function.functionSignature.forEachOptionalParameter((param) {
       ConstantValue constant = glue.getDefaultParameterValue(param);
       registry.registerCompileTimeConstant(constant);
     });
   }
 }