Standardize usage of virtual/override/final specifiers in sync/.

sync/syncable/directory_unittest.h

 // Copyright 2014 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_SYNCABLE_DIRECTORY_UNITTEST_H_
 #define SYNC_SYNCABLE_DIRECTORY_UNITTEST_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 17 matching lines @@
 
 // A test fixture for syncable::Directory.  Uses an in-memory database to keep
 // the unit tests fast.
 //
 // Serves as base class for several other test fixtures.
 class SyncableDirectoryTest : public testing::Test {
  protected:
   static const char kDirectoryName[];
 
   SyncableDirectoryTest();
-  virtual ~SyncableDirectoryTest();
+  ~SyncableDirectoryTest() override;
 
-  virtual void SetUp();
-  virtual void TearDown();
+  void SetUp() override;
+  void TearDown() override;
 
   // Destroys any currently opened directory, creates and opens a new one.
   //
   // Returns result of the Open call.
   DirOpenResult ReopenDirectory();
 
   // Creates an empty entry and sets the ID field to a default one.
   void CreateEntry(const ModelType& model_type, const std::string& entryname);
 
   // Creates an empty entry and sets the ID field to id.
@@ skipping 53 matching lines @@
   FakeEncryptor encryptor_;
   TestUnrecoverableErrorHandler handler_;
   sql::Connection connection_;
 };
 
 }  // namespace syncable
 
 }  // namespace syncer
 
 #endif  // SYNC_SYNCABLE_DIRECTORY_UNITTEST_H_