dart2js cps: Support inlining constructors with type arguments.

pkg/compiler/lib/src/js_backend/codegen/codegen.dart

Index: pkg/compiler/lib/src/js_backend/codegen/codegen.dart
diff --git a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
index bc8ed93511e60d6b00bfbe1c2f38bc95a481ac47..9cb39ed36c73f1589a4bc5b2938e8b83085f7999 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
@@ -814,12 +814,8 @@ class CodeGenerator extends tree_ir.StatementVisitor
 
   @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);
     }