[Sync] Replace typedef with using.

components/sync/model/mock_model_type_store.h

 // Copyright 2015 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_MODEL_MOCK_MODEL_TYPE_STORE_H_
 #define COMPONENTS_SYNC_MODEL_MOCK_MODEL_TYPE_STORE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 26 matching lines @@
 // mock_model_type_store.RegisterReadDataHandler(base::Bind(&OnReadData));
 // ModelTypeStore::IdList id_list;
 // id_list.push_back("id1");
 // mock_model_type_store.ReadData(id_list, base::Bind(&ReadDone));
 // ===
 // TODO(pavel): When in-memory store is available this class should delegate all
 // calls to it instead of returning empty successful results.
 class MockModelTypeStore : public ModelTypeStore {
  public:
   // Signatures for all ModelTypeStore virtual functions.
-  typedef base::Callback<void(const ReadAllDataCallback&)> ReadAllDataSignature;
-  typedef base::Callback<void(const IdList&, const ReadDataCallback&)>
-      ReadDataSignature;
-  typedef base::Callback<void(const ReadMetadataCallback& callback)>
-      ReadAllMetadataSignature;
-  typedef base::Callback<void(std::unique_ptr<WriteBatch>, CallbackWithResult)>
-      CommitWriteBatchSignature;
-  typedef base::Callback<
-      void(WriteBatch*, const std::string&, const std::string&)>
-      WriteRecordSignature;
-  typedef base::Callback<void(WriteBatch*, const std::string&)>
-      WriteGlobalMetadataSignature;
-  typedef base::Callback<void(WriteBatch*, const std::string&)>
-      DeleteRecordSignature;
-  typedef base::Callback<void(WriteBatch*)> DeleteGlobalMetadataSignature;
+  using ReadAllDataSignature = base::Callback<void(const ReadAllDataCallback&)>;
+  using ReadDataSignature =
+      base::Callback<void(const IdList&, const ReadDataCallback&)>;
+  using ReadAllMetadataSignature =
+      base::Callback<void(const ReadMetadataCallback& callback)>;
+  using CommitWriteBatchSignature =
+      base::Callback<void(std::unique_ptr<WriteBatch>, CallbackWithResult)>;
+  using WriteRecordSignature =
+      base::Callback<void(WriteBatch*, const std::string&, const std::string&)>;
+  using WriteGlobalMetadataSignature =
+      base::Callback<void(WriteBatch*, const std::string&)>;
+  using DeleteRecordSignature =
+      base::Callback<void(WriteBatch*, const std::string&)>;
+  using DeleteGlobalMetadataSignature = base::Callback<void(WriteBatch*)>;
 
   MockModelTypeStore();
   ~MockModelTypeStore() override;
 
   // ModelTypeStore implementation.
   void ReadData(const IdList& id_list,
                 const ReadDataCallback& callback) override;
   void ReadAllData(const ReadAllDataCallback& callback) override;
   void ReadAllMetadata(const ReadMetadataCallback& callback) override;
 
@@ skipping 39 matching lines @@
   WriteRecordSignature write_metadata_handler_;
   WriteGlobalMetadataSignature write_global_metadata_handler_;
   DeleteRecordSignature delete_data_handler_;
   DeleteRecordSignature delete_metadata_handler_;
   DeleteGlobalMetadataSignature delete_global_metadata_handler_;
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_MODEL_MOCK_MODEL_TYPE_STORE_H_