Create type masks lazily.

sdk/lib/_internal/compiler/implementation/compiler.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.
 
 part of dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 134 matching lines @@
   /// Called during resolution to notify to the backend that the
   /// program has a global variable with a lazy initializer.
   void registerLazyField(TreeElements elements) {}
 
   /// Called during resolution to notify to the backend that the
   /// program uses a type variable as an expression.
   void registerTypeVariableExpression(TreeElements elements) {}
 
   /// Called during resolution to notify to the backend that the
   /// program uses a type literal.
-  void registerTypeLiteral(Element element, TreeElements elements) {}
+  void registerTypeLiteral(Element element,
+                           Enqueuer enqueuer,
+                           TreeElements elements) {}
 
   /// Called during resolution to notify to the backend that the
   /// program has a catch statement with a stack trace.
   void registerStackTraceInCatch(TreeElements elements) {}
 
   /// Register an is check to the backend.
   void registerIsCheck(DartType type,
                        Enqueuer enqueuer,
                        TreeElements elements) {}
 
@@ skipping 1400 matching lines @@
 
   void close() {}
 
   toString() => name;
 
   /// Convenience method for getting an [api.CompilerOutputProvider].
   static NullSink outputProvider(String name, String extension) {
     return new NullSink('$name.$extension');
   }
 }