dart2js cps: Support inlining constructors with type arguments.

pkg/compiler/lib/src/cps_ir/scalar_replacement.dart

 // Copyright (c) 2015, 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.cps_ir.scalar_replacement;
 
 import 'optimizers.dart';
 
 import 'dart:collection' show Queue;
 
 import '../common.dart';
@@ skipping 57 matching lines @@
       _current = allocation;
       tryScalarReplacement(allocation);
     }
   }
 
   void tryScalarReplacement(Primitive allocation) {
 
     // We can do scalar replacement of an aggregate if all uses of an allocation
     // are reads or writes.
     for (Reference ref = allocation.firstRef; ref != null; ref = ref.next) {
+      // TODO(asgerf): Also handle ReadTypeVariable.
       Node use = ref.parent;
       if (use is GetField) continue;
       if (use is SetField && use.object == ref) continue;
       return;
     }
 
     Set<FieldElement> reads = new Set<FieldElement>();
     Set<FieldElement> writes = new Set<FieldElement>();
     for (Reference ref = allocation.firstRef; ref != null; ref = ref.next) {
       Node use = ref.parent;
@@ skipping 132 matching lines @@
 class ScalarReplacementRemovalVisitor extends TrampolineRecursiveVisitor {
   ScalarReplacementVisitor process;
 
   ScalarReplacementRemovalVisitor(this.process);
 
   processReference(Reference reference) {
     process.reconsider(reference.definition);
     reference.unlink();
   }
 }