Fix a bunch of IWYU violators that don't include scoped_ptr.h

components/visitedlink/browser/visitedlink_master.h

 // Copyright (c) 2012 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 COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_MASTER_H_
 #define COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_MASTER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <set>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/callback_forward.h"
 #include "base/files/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "build/build_config.h"
 #include "components/visitedlink/common/visitedlink_common.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
@@ skipping 453 matching lines @@
     if (hash_table_[i])
       used_count++;
   }
   DCHECK_EQ(used_count, used_items_);
 }
 #endif
 
 }  // namespace visitedlink
 
 #endif  // COMPONENTS_VISITEDLINK_BROWSER_VISITEDLINK_MASTER_H_