components: Cleanup class/struct fwd declarations

components/sync/syncable/write_node.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_SYNCABLE_WRITE_NODE_H_
 #define COMPONENTS_SYNC_SYNCABLE_WRITE_NODE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/syncable/base_node.h"
 
 namespace sync_pb {
 class BookmarkSpecifics;
 class EntitySpecifics;
 class NigoriSpecifics;
 class PasswordSpecificsData;
 class TypedUrlSpecifics;
 }
 
 namespace syncer {
 
-class Cryptographer;
 class WriteTransaction;
 
 namespace syncable {
 class Id;
 class Entry;
 class MutableEntry;
 }
 
 // WriteNode extends BaseNode to add mutation, and wraps
 // syncable::MutableEntry. A WriteTransaction is needed to create a WriteNode.
@@ skipping 132 matching lines @@
 
   // The sync API transaction that is the parent of this node.
   WriteTransaction* transaction_;
 
   DISALLOW_COPY_AND_ASSIGN(WriteNode);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_SYNCABLE_WRITE_NODE_H_