Standardize usage of virtual/override/final specifiers.

components/precache/core/precache_database_unittest.cc

 // Copyright 2013 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 "components/precache/core/precache_database.h"
 
 #include <map>
 
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
@@ skipping 36 matching lines @@
   return url_table_map;
 }
 
 }  // namespace
 
 namespace precache {
 
 class PrecacheDatabaseTest : public testing::Test {
  public:
   PrecacheDatabaseTest() {}
-  virtual ~PrecacheDatabaseTest() {}
+  ~PrecacheDatabaseTest() override {}
 
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     base::StatisticsRecorder::Initialize();
     precache_database_ = new PrecacheDatabase();
 
     ASSERT_TRUE(scoped_temp_dir_.CreateUniqueTempDir());
     base::FilePath db_path = scoped_temp_dir_.path().Append(
         base::FilePath(FILE_PATH_LITERAL("precache_database")));
     precache_database_->Init(db_path);
 
     // Log a sample for each histogram, to ensure that they are all created.
     // This has to be done here, and not in the for loop below, because of the
@@ skipping 311 matching lines @@
 
   scoped_ptr<base::HistogramSamples> saved_bytes_cellular(
       GetHistogramSamplesDelta("Precache.Saved.Cellular"));
   EXPECT_EQ(1, saved_bytes_cellular->TotalCount());
   EXPECT_EQ(1, saved_bytes_cellular->GetCount(kSize1));
 }
 
 }  // namespace
 
 }  // namespace precache