Revert 75287 - [Sync] Initial support for encrypting any datatype (no UI hook...

chrome/browser/sync/syncable/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 nigory-based multi-type encryption.
-
-#ifndef CHROME_BROWSER_SYNC_SYNCABLE_NIGORI_UTIL_H_
-#define CHROME_BROWSER_SYNC_SYNCABLE_NIGORI_UTIL_H_
-#pragma once
-
-#include "chrome/browser/sync/protocol/nigori_specifics.pb.h"
-#include "chrome/browser/sync/syncable/model_type.h"
-
-namespace browser_sync {
-class Cryptographer;
-}
-
-namespace syncable {
-
-class BaseTransaction;
-class ReadTransaction;
-class WriteTransaction;
-
-// Returns the set of datatypes that require encryption as specified by the
-// Sync DB's nigori node. This will never include passwords, as the encryption
-// status of that is always on if passwords are enabled..
-ModelTypeSet GetEncryptedDataTypes(BaseTransaction* const trans);
-
-// Extract the set of encrypted datatypes from a nigori node.
-ModelTypeSet GetEncryptedDataTypesFromNigori(
-    const sync_pb::NigoriSpecifics& nigori);
-
-// Set the encrypted datatypes on the nigori node.
-void FillNigoriEncryptedTypes(const ModelTypeSet& types,
-    sync_pb::NigoriSpecifics* nigori);
-
-// 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,
-    const ModelTypeSet& encrypted_types);
-
-// Processes all unsynced changes and ensures they are appropriately encrypted
-// or unencrypted, based on |encrypted_types|.
-bool ProcessUnsyncedChangesForEncryption(
-    WriteTransaction* const trans,
-    const syncable::ModelTypeSet& encrypted_types,
-    browser_sync::Cryptographer* cryptographer);
-
-// Verifies all data of type |type| is encrypted if |is_encrypted| is true or is
-// unencrypted otherwise.
-bool VerifyDataTypeEncryption(BaseTransaction* const trans,
-                              ModelType type,
-                              bool is_encrypted);
-
-}  // namespace syncable
-
-#endif  // CHROME_BROWSER_SYNC_SYNCABLE_NIGORI_UTIL_H_