sync: Move unique_client_tag hashing code

sync/internal_api/public/base_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 SYNC_INTERNAL_API_PUBLIC_BASE_NODE_H_
 #define SYNC_INTERNAL_API_PUBLIC_BASE_NODE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 182 matching lines @@
   // Transfers ownership of the DictionaryValue to the caller.
   base::DictionaryValue* GetSummaryAsValue() const;
 
   // Dumps all node details into a DictionaryValue and returns it.
   // Transfers ownership of the DictionaryValue to the caller.
   base::DictionaryValue* GetDetailsAsValue() const;
 
  protected:
   BaseNode();
   virtual ~BaseNode();
-  // The server has a size limit on client tags, so we generate a fixed length
-  // hash locally. This also ensures that ModelTypes have unique namespaces.
-  static std::string GenerateSyncableHash(
-      ModelType model_type,
-      const std::string& client_tag);
 
   // Determines whether part of the entry is encrypted, and if so attempts to
   // decrypt it. Unless decryption is necessary and fails, this will always
   // return |true|. If the contents are encrypted, the decrypted data will be
   // stored in |unencrypted_data_|.
   // This method is invoked once when the BaseNode is initialized.
   bool DecryptIfNecessary();
 
   // Returns the unencrypted specifics associated with |entry|. If |entry| was
   // not encrypted, it directly returns |entry|'s EntitySpecifics. Otherwise,
@@ skipping 29 matching lines @@
 
   // Same as |unencrypted_data_|, but for legacy password encryption.
   scoped_ptr<sync_pb::PasswordSpecificsData> password_data_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseNode);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_BASE_NODE_H_