Standardize usage of virtual/override/final specifiers.

chrome/browser/prefs/synced_pref_change_registrar_browsertest.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 <string>
 
 #include "base/json/json_string_value_serializer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "base/values.h"
@@ skipping 21 matching lines @@
 #endif
 
 namespace {
 
 using testing::Return;
 using testing::_;
 
 class SyncedPrefChangeRegistrarTest : public InProcessBrowserTest {
  public:
   SyncedPrefChangeRegistrarTest() : next_sync_data_id_(0) {}
-  virtual ~SyncedPrefChangeRegistrarTest() {}
+  ~SyncedPrefChangeRegistrarTest() override {}
 
 #if defined(ENABLE_CONFIGURATION_POLICY)
   void UpdateChromePolicy(const policy::PolicyMap& policies) {
     policy_provider_.UpdateChromePolicy(policies);
     DCHECK(base::MessageLoop::current());
     base::RunLoop loop;
     loop.RunUntilIdle();
   }
 #endif
 
@@ skipping 161 matching lines @@
                new base::FundamentalValue(true),
                NULL);
   UpdateChromePolicy(policies);
 
   EXPECT_TRUE(prefs()->IsManagedPreference(prefs::kShowHomeButton));
   SetBooleanPrefValueFromSync(prefs::kShowHomeButton, false);
   EXPECT_FALSE(observer.has_been_notified);
   EXPECT_TRUE(GetBooleanPrefValue(prefs::kShowHomeButton));
 }
 #endif