iwyu: Use callback_old.h where appropriate, part 2.

chrome/renderer/safe_browsing/scorer.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // This class loads a client-side model and lets you compute a phishing score
 // for a set of previously extracted features.  The phishing score corresponds
 // to the probability that the features are indicative of a phishing site.
 //
 // For more details on how the score is actually computed for a given model
 // and a given set of features read the comments in client_model.proto file.
 //
 // See features.h for a list of features that are currently used.
 
 #ifndef CHROME_RENDERER_SAFE_BROWSING_SCORER_H_
 #define CHROME_RENDERER_SAFE_BROWSING_SCORER_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
-#include "base/callback.h"
+#include "base/callback_old.h"
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop_proxy.h"
 #include "base/platform_file.h"
 #include "base/string_piece.h"
 #include "chrome/renderer/safe_browsing/client_model.pb.h"
 
 namespace safe_browsing {
 class FeatureMap;
 
@@ skipping 59 matching lines @@
 
   ClientSideModel model_;
   base::hash_set<std::string> page_terms_;
   base::hash_set<std::string> page_words_;
 
   DISALLOW_COPY_AND_ASSIGN(Scorer);
 };
 }  // namepsace safe_browsing
 
 #endif  // CHROME_RENDERER_SAFE_BROWSING_SCORER_H_