Support correct factory syntax in the VM as decribed in the spec.

runtime/vm/ast.h

 // Copyright (c) 2011, 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.
 
 #ifndef VM_AST_H_
 #define VM_AST_H_
 
 #include "vm/allocation.h"
 #include "vm/assert.h"
 #include "vm/growable_array.h"
@@ skipping 1656 matching lines @@
                       const TypeArguments& type_arguments,
                       const Function& constructor,
                       ArgumentListNode* arguments)
       : AstNode(token_index),
         type_arguments_(type_arguments),
         constructor_(constructor),
         arguments_(arguments) {
     ASSERT(type_arguments_.IsZoneHandle());
     ASSERT(constructor_.IsZoneHandle());
     ASSERT(arguments_ != NULL);
-    ASSERT(type_arguments_.IsNull() ||
-           (type_arguments_.Length() ==
-            Class::Handle(constructor_.owner()).NumTypeArguments()));
   }
 
   const TypeArguments& type_arguments() const { return type_arguments_; }
   const Function& constructor() const { return constructor_; }
   ArgumentListNode* arguments() const { return arguments_; }
 
   virtual void VisitChildren(AstNodeVisitor* visitor) const {
     arguments()->Visit(visitor);
   }
 
@@ skipping 192 matching lines @@
   const LocalVariable& context_var_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(InlinedFinallyNode);
 };
 
 }  // namespace dart
 
 #undef DECLARE_COMMON_NODE_FUNCTIONS
 
 #endif  // VM_AST_H_