Use callback_forward.h instead of callback.h where possible.

chrome/browser/safe_browsing/safe_browsing_store.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.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_STORE_H_
 #define CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_STORE_H_
 #pragma once
 
 #include <set>
 #include <vector>
 
 #include "base/basictypes.h"
-#include "base/callback.h"
+#include "base/callback_forward.h"
 #include "base/hash_tables.h"
 #include "base/time.h"
 #include "chrome/browser/safe_browsing/safe_browsing_util.h"
 
 class FilePath;
 
 // SafeBrowsingStore provides a storage abstraction for the
 // safe-browsing data used to build the bloom filter.  The items
 // stored are:
 //   The set of add and sub chunks seen.
@@ skipping 213 matching lines @@
 
   // Cancel the update in process and remove any temporary disk
   // storage, leaving the original data unmodified.
   virtual bool CancelUpdate() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingStore);
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_STORE_H_