Cleanup remaining class/struct fwd declarations

rlz/chromeos/lib/rlz_value_store_chromeos.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 RLZ_CHROMEOS_LIB_RLZ_VALUE_STORE_CHROMEOS_H_
 #define RLZ_CHROMEOS_LIB_RLZ_VALUE_STORE_CHROMEOS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/values.h"
 #include "rlz/lib/rlz_value_store.h"
 
 namespace base {
-class ListValue;
 class SequencedTaskRunner;
 class Value;
 }
 
 namespace rlz_lib {
 
 // An implementation of RlzValueStore for ChromeOS.
 class RlzValueStoreChromeOS : public RlzValueStore,
                               public base::NonThreadSafe {
  public:
@@ skipping 51 matching lines @@
   base::FilePath store_path_;
 
   bool read_only_;
 
   DISALLOW_COPY_AND_ASSIGN(RlzValueStoreChromeOS);
 };
 
 }  // namespace rlz_lib
 
 #endif  // RLZ_CHROMEOS_LIB_RLZ_VALUE_STORE_CHROMEOS_H_