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

sync/internal_api/sync_manager_impl_unittest.cc

 // 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.
 
 // Unit tests for the SyncApi. Note that a lot of the underlying
 // functionality is provided by the Syncable layer, which has its own
 // unit tests. We'll test SyncApi specific things in this harness.
 
 #include <cstddef>
 #include <map>
@@ skipping 181 matching lines @@
   entry.PutUniqueClientTag(hashed_tag);
   entry.PutIsDel(false);
   entry.PutSpecifics(specifics);
   return entry.GetMetahandle();
 }
 
 }  // namespace
 
 class SyncApiTest : public testing::Test {
  public:
-  virtual void SetUp() {
-    test_user_share_.SetUp();
-  }
+  void SetUp() override { test_user_share_.SetUp(); }
 
-  virtual void TearDown() {
-    test_user_share_.TearDown();
-  }
+  void TearDown() override { test_user_share_.TearDown(); }
 
  protected:
   // Create an entry with the given |model_type|, |client_tag| and
   // |attachment_metadata|.
   void CreateEntryWithAttachmentMetadata(
       const ModelType& model_type,
       const std::string& client_tag,
       const sync_pb::AttachmentMetadata& attachment_metadata);
 
   // Attempts to load the entry specified by |model_type| and |client_tag| and
@@ skipping 2955 matching lines @@
 // SyncManagerInitInvalidStorageTest::GetFactory will return
 // DirectoryBackingStore that ensures that SyncManagerImpl::OpenDirectory fails.
 // SyncManagerImpl initialization is done in SyncManagerTest::SetUp. This test's
 // task is to ensure that SyncManagerImpl reported initialization failure in
 // OnInitializationComplete callback.
 TEST_F(SyncManagerInitInvalidStorageTest, FailToOpenDatabase) {
   EXPECT_FALSE(initialization_succeeded_);
 }
 
 }  // namespace syncer