Standardize usage of virtual/override/final specifiers.

chrome/browser/safe_browsing/safe_browsing_database_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.
 //
 // Unit tests for the SafeBrowsing storage system.
 
 #include "chrome/browser/safe_browsing/safe_browsing_database.h"
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 236 matching lines @@
     }
 
     return false;
   }
 };
 
 }  // namespace
 
 class SafeBrowsingDatabaseTest : public PlatformTest {
  public:
-  virtual void SetUp() {
+  void SetUp() override {
     PlatformTest::SetUp();
 
     // Setup a database in a temporary directory.
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     database_.reset(new SafeBrowsingDatabaseNew);
     database_filename_ =
         temp_dir_.path().AppendASCII("SafeBrowsingTestDatabase");
     database_->Init(database_filename_);
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     database_.reset();
 
     PlatformTest::TearDown();
   }
 
   void GetListsInfo(std::vector<SBListChunkRanges>* lists) {
     lists->clear();
     ASSERT_TRUE(database_->UpdateStarted(lists));
     database_->UpdateFinished(true);
   }
@@ skipping 1850 matching lines @@
       GURL(std::string("http://") + kExampleCollision),
       &prefix_hits, &cache_hits));
   ASSERT_EQ(1U, prefix_hits.size());
   EXPECT_EQ(SBPrefixForString(kExampleCollision), prefix_hits[0]);
   EXPECT_TRUE(cache_hits.empty());
 
   // This prefix collides, but no full hash match.
   EXPECT_FALSE(database_->ContainsBrowseUrl(
       GURL(std::string("http://") + kExampleFine), &prefix_hits, &cache_hits));
 }