Standardize usage of virtual/override/final specifiers.

chrome/browser/apps/ephemeral_app_service_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 <algorithm>
 
 #include "base/rand_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
 #include "chrome/browser/apps/ephemeral_app_service.h"
@@ skipping 19 matching lines @@
   return generated_time;
 }
 
 }  // namespace
 
 class EphemeralAppServiceTest : public testing::Test {
  protected:
   typedef EphemeralAppService::LaunchTimeAppMap LaunchTimeAppMap;
 
   EphemeralAppServiceTest() {}
-  virtual ~EphemeralAppServiceTest() {}
+  ~EphemeralAppServiceTest() override {}
 
   void RunTest(int ephemeral_app_count,
                const LaunchTimeAppMap& launch_times,
                const std::set<std::string>& expected_removed_ids) {
     std::set<std::string> remove_app_ids;
     EphemeralAppService::GetAppsToRemove(ephemeral_app_count,
                                          launch_times,
                                          &remove_app_ids);
     EXPECT_EQ(expected_removed_ids, remove_app_ids);
   }
@@ skipping 206 matching lines @@
   const int kRunningApps = 3;
   AddIntermediateApps(
       time_now,
       EphemeralAppService::kMaxEphemeralAppsCount,
       &launch_times);  // overflow
   RunTestCheckLRU(
       launch_times.size() + kRunningApps,
       launch_times,
       kRunningApps);
 }