Standardize usage of virtual/override/final specifiers.

chrome/browser/sync/test/integration/single_client_extensions_sync_test.cc

 // 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.
 
 #include "base/basictypes.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/test/integration/extensions_helper.h"
 #include "chrome/browser/sync/test/integration/sync_integration_test_util.h"
 #include "chrome/browser/sync/test/integration/sync_test.h"
 
 using extensions_helper::AllProfilesHaveSameExtensionsAsVerifier;
 using extensions_helper::InstallExtension;
 using sync_integration_test_util::AwaitCommitActivityCompletion;
 
 class SingleClientExtensionsSyncTest : public SyncTest {
  public:
   SingleClientExtensionsSyncTest() : SyncTest(SINGLE_CLIENT) {}
 
-  virtual ~SingleClientExtensionsSyncTest() {}
+  ~SingleClientExtensionsSyncTest() override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SingleClientExtensionsSyncTest);
 };
 
 IN_PROC_BROWSER_TEST_F(SingleClientExtensionsSyncTest, StartWithNoExtensions) {
   ASSERT_TRUE(SetupSync());
 
   ASSERT_TRUE(AllProfilesHaveSameExtensionsAsVerifier());
 }
@@ skipping 19 matching lines @@
   const int kNumExtensions = 5;
   for (int i = 0; i < kNumExtensions; ++i) {
     InstallExtension(GetProfile(0), i);
     InstallExtension(verifier(), i);
   }
 
   ASSERT_TRUE(AwaitCommitActivityCompletion(GetSyncService((0))));
 
   ASSERT_TRUE(AllProfilesHaveSameExtensionsAsVerifier());
 }