Standardize usage of virtual/override/final specifiers.

chrome/browser/about_flags_unittest.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 <stdint.h>
 
 #include "base/files/file_path.h"
 #include "base/memory/scoped_vector.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_registry_simple.h"
@@ skipping 274 matching lines @@
   },
 };
 
 class AboutFlagsTest : public ::testing::Test {
  protected:
   AboutFlagsTest() : flags_storage_(&prefs_) {
     prefs_.registry()->RegisterListPref(prefs::kEnabledLabsExperiments);
     testing::ClearState();
   }
 
-  virtual void SetUp() override {
+  void SetUp() override {
     for (size_t i = 0; i < arraysize(kExperiments); ++i)
       kExperiments[i].supported_platforms = GetCurrentPlatform();
 
     int os_other_than_current = 1;
     while (os_other_than_current == GetCurrentPlatform())
       os_other_than_current <<= 1;
     kExperiments[2].supported_platforms = os_other_than_current;
 
     testing::SetExperiments(kExperiments, arraysize(kExperiments));
   }
 
-  virtual void TearDown() override {
-    testing::SetExperiments(NULL, 0);
-  }
+  void TearDown() override { testing::SetExperiments(NULL, 0); }
 
   TestingPrefServiceSimple prefs_;
   PrefServiceFlagsStorage flags_storage_;
 };
 
 
 TEST_F(AboutFlagsTest, NoChangeNoRestart) {
   EXPECT_FALSE(IsRestartNeededToCommitChanges());
   SetExperimentEnabled(&flags_storage_, kFlags1, false);
   EXPECT_FALSE(IsRestartNeededToCommitChanges());
@@ skipping 445 matching lines @@
     EXPECT_TRUE(enum_entry != histograms_xml_switches_ids.end() &&
                 enum_entry->first == *it)
         << "histograms.xml enum LoginCustomFlags doesn't contain switch '"
         << *it << "' (value=" << uma_id
         << " expected). Consider adding entry:\n"
         << "  " << GetHistogramEnumEntryText(*it, uma_id);
   }
 }
 
 }  // namespace about_flags