Implement implicit constructors in mixin applications.

sdk/lib/_internal/compiler/implementation/enqueue.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;
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
   final CodegenEnqueuer codegen;
 
@@ skipping 41 matching lines @@
 
   /**
    * Documentation wanted -- johnniwinther
    *
    * Invariant: [element] must be a declaration element.
    */
   void addToWorkList(Element element, [TreeElements elements]) {
     assert(invariant(element, element.isDeclaration));
     if (element.isForeign(compiler)) return;
 
+    if (element.isForwardingConstructor) {
+      addToWorkList(element.targetConstructor, elements);
+      return;
+    }
+
     if (!addElementToWorkList(element, elements)) return;
 
     // Enable runtime type support if we discover a getter called runtimeType.
     // We have to enable runtime type before hitting the codegen, so
     // that constructors know whether they need to generate code for
     // runtime type.
     if (element.isGetter() && element.name == Compiler.RUNTIME_TYPE) {
       compiler.enabledRuntimeType = true;
       // TODO(ahe): Record precise dependency here.
       compiler.backend.registerRuntimeType(compiler.globalDependencies);
@@ skipping 530 matching lines @@
     while(!queue.isEmpty) {
       // TODO(johnniwinther): Find an optimal process order for codegen.
       f(queue.removeLast());
     }
   }
 
   void _logSpecificSummary(log(message)) {
     log('Compiled ${generatedCode.length} methods.');
   }
 }