Many type fixes.

lib/compiler/implementation/util/link_implementation.dart

 // 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.
 
 class LinkIterator<T> implements Iterator<T> {
   Link<T> current;
   LinkIterator(Link<T> this.current);
   bool hasNext() => !current.isEmpty();
   T next() {
     T result = current.head;
@@ skipping 44 matching lines @@
 
   void printOn(StringBuffer buffer, [separatedBy]) {
   }
 
   String toString() => "[]";
 
   Link<T> reverse() => this;
 
   Link<T> reversePrependAll(Link<T> from) {
     if (from.isEmpty()) return this;
-    return from.head.reversePrependAll(from.tail);
+    return this.prepend(from.head).reversePrependAll(from.tail);
   }
 
   List toList() => const [];
 
   bool isEmpty() => true;
 
   void forEach(void f(T element)) {}
 }
 
 class LinkEntry<T> implements Link<T> {
@@ skipping 80 matching lines @@
     length++;
     LinkEntry<T> entry = new LinkEntry<T>(t, null);
     if (head === null) {
       head = entry;
     } else {
       lastLink.tail = entry;
     }
     lastLink = entry;
   }
 }