Start adding support for mixin application syntax. We now parse the typedef variant of mixin applic…

sdk/lib/_internal/compiler/implementation/tree/prettyprint.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 tree;
 
 /**
  * Pretty-prints Node tree in XML-like format.
  *
  * TODO(smok): Add main() to run from command-line to print out tree for given
@@ skipping 245 matching lines @@
 
   visitLiteralNull(LiteralNull node) {
     printLiteral(node, "LiteralNull");
   }
 
   visitLiteralString(LiteralString node) {
     openAndCloseNode(node, "LiteralString",
         {"value" : node.token.slowToString()});
   }
 
+  visitMixinApplication(MixinApplication node) {
+    visitNodeWithChildren(node, "MixinApplication");
+  }
+
   visitModifiers(Modifiers node) {
     visitNodeWithChildren(node, "Modifiers");
   }
 
   visitNamedArgument(NamedArgument node) {
     visitNodeWithChildren(node, "NamedArgument");
   }
 
   visitNewExpression(NewExpression node) {
     visitNodeWithChildren(node, "NewExpression");
@@ skipping 187 matching lines @@
   }
 
   visitStringNode(StringNode node) {
     unimplemented('visitNode', node: node);
   }
 
   unimplemented(String message, {Node node}) {
     throw message;
   }
 }