Inline StringValue into base::Value

components/sync/base/model_type.h

 // Copyright 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_SYNC_BASE_MODEL_TYPE_H_
 #define COMPONENTS_SYNC_BASE_MODEL_TYPE_H_
 
 #include <map>
 #include <memory>
 #include <ostream>
 #include <set>
 #include <string>
 
 #include "base/logging.h"
 #include "components/sync/base/enum_set.h"
 
 namespace base {
 class ListValue;
-class StringValue;
 class Value;
+using StringValue = Value;
 }
 
 namespace sync_pb {
 class EntitySpecifics;
 class SyncEntity;
 }
 
 namespace syncer {
 
 // Enumerate the various item subtypes that are supported by sync.
@@ skipping 317 matching lines @@
 
 // Returns true if |model_type| supports parent-child hierarchy or entries.
 bool TypeSupportsHierarchy(ModelType model_type);
 
 // Returns true if |model_type| supports ordering of sibling entries.
 bool TypeSupportsOrdering(ModelType model_type);
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_BASE_MODEL_TYPE_H_