Introduces the new syntax for deferred loading

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 471 matching lines @@
   FunctionElement mirrorsUsedConstructor;
 
   // Initialized when dart:mirrors is loaded.
   ClassElement deferredLibraryClass;
 
   ClassElement jsInvocationMirrorClass;
   /// Document class from dart:mirrors.
   ClassElement documentClass;
   Element assertMethod;
   Element identicalFunction;
+  Element loadLibraryFunction;
   Element functionApplyMethod;
   Element invokeOnMethod;
   Element intEnvironment;
   Element boolEnvironment;
   Element stringEnvironment;
 
   fromEnvironment(String name) => null;
 
   Element get currentElement => _currentElement;
 
@@ skipping 1328 matching lines @@
   static NullSink outputProvider(String name, String extension) {
     return new NullSink('$name.$extension');
   }
 }
 
 /// Information about suppressed warnings and hints for a given library.
 class SuppressionInfo {
   int warnings = 0;
   int hints = 0;
 }