Standardize usage of virtual/override/final specifiers.

chrome/browser/safe_browsing/protocol_manager_unittest.cc

 // Copyright (c) 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.
 //
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/test_simple_task_runner.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 54 matching lines @@
   'e', 'f', 'g', 'h'         // 4-byte prefix
 };
 const std::string kChunkPayload2(kRawChunkPayload2, sizeof(kRawChunkPayload2));
 
 }  // namespace
 
 class SafeBrowsingProtocolManagerTest : public testing::Test {
  protected:
   std::string key_param_;
 
-  virtual void SetUp() {
+  void SetUp() override {
     std::string key = google_apis::GetAPIKey();
     if (!key.empty()) {
       key_param_ = base::StringPrintf(
           "&key=%s",
           net::EscapeQueryParamValue(key, true).c_str());
     }
   }
 
   scoped_ptr<SafeBrowsingProtocolManager> CreateProtocolManager(
       SafeBrowsingProtocolManagerDelegate* delegate) {
@@ skipping 1040 matching lines @@
   second_chunk_url_fetcher->delegate()->OnURLFetchComplete(
       second_chunk_url_fetcher);
 
   EXPECT_FALSE(pm->IsUpdateScheduled());
 
   // Invoke the AddChunksCallback to finish the update.
   runner->RunPendingTasks();
 
   EXPECT_TRUE(pm->IsUpdateScheduled());
 }