make dart2js_info strong-mode clean

bin/code_deps.dart

 // Copyright (c) 2015, 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.
 
 /// Command-line tool to query for code dependencies. Currently this tool only
 /// supports the `some_path` query, which gives you the shortest path for how
 /// one function depends on another.
 ///
 /// You can run this tool as follows:
 /// ```bash
@@ skipping 78 matching lines @@
   /// The info associated with the source element.
   Info source;
 
   /// The info associated with the target element.
   Info target;
 
   SomePathQuery(this.source, this.target);
 
   List<Info> run(Graph<Info> graph) {
     var seen = {source: null};
-    var queue = new Queue();
+    var queue = new Queue<Info>();
     queue.addLast(source);
     while (queue.isNotEmpty) {
       var node = queue.removeFirst();
       if (identical(node, target)) {
-        var result = new Queue();
+        var result = new Queue<Info>();
         while (node != null) {
           result.addFirst(node);
           node = seen[node];
         }
         return result.toList();
       }
       for (var neighbor in graph.targetsOf(node)) {
         if (seen.containsKey(neighbor)) continue;
         seen[neighbor] = node;
         queue.addLast(neighbor);
       }
     }
     return [];
   }
 }
 
-_longNameMatcher(RegExp regexp) => (e) => regexp.hasMatch(longName(e));
+typedef bool LongNameMatcher(FunctionInfo info);
+
+LongNameMatcher _longNameMatcher(RegExp regexp) =>
+    (e) => regexp.hasMatch(longName(e));