Cleanup: Remove unneeded forward declarations in chrome/browser/sync.

chrome/browser/sync/engine/nigori_util.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.
 
 // Various utility methods for nigori-based multi-type encryption.
 
 #ifndef CHROME_BROWSER_SYNC_ENGINE_NIGORI_UTIL_H_
 #define CHROME_BROWSER_SYNC_ENGINE_NIGORI_UTIL_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/sync/protocol/nigori_specifics.pb.h"
 #include "chrome/browser/sync/syncable/model_type.h"
 
 namespace browser_sync {
 class Cryptographer;
 }
 
 namespace sync_pb {
 class EntitySpecifics;
 }
 
 namespace syncable {
 
 const char kEncryptedString[] = "encrypted";
 
 class BaseTransaction;
 class Entry;
-class ReadTransaction;
 class WriteTransaction;
 
 // Check if our unsyced changes are encrypted if they need to be based on
 // |encrypted_types|.
 // Returns: true if all unsynced data that should be encrypted is.
 //          false if some unsynced changes need to be encrypted.
 // This method is similar to ProcessUnsyncedChangesForEncryption but does not
 // modify the data and does not care if data is unnecessarily encrypted.
 bool VerifyUnsyncedChangesAreEncrypted(
     BaseTransaction* const trans,
@@ skipping 18 matching lines @@
 // Verifies all data of type |type| is encrypted appropriately.
 bool VerifyDataTypeEncryptionForTest(
     BaseTransaction* const trans,
     browser_sync::Cryptographer* cryptographer,
     ModelType type,
     bool is_encrypted) WARN_UNUSED_RESULT;
 
 }  // namespace syncable
 
 #endif  // CHROME_BROWSER_SYNC_ENGINE_NIGORI_UTIL_H_