Standardize usage of virtual/override/final specifiers.

extensions/browser/quota_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 "base/message_loop/message_loop.h"
 #include "base/process/process.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "content/public/test/test_browser_thread.h"
 #include "extensions/browser/extension_function.h"
@@ skipping 110 matching lines @@
 }  // namespace
 
 class QuotaServiceTest : public testing::Test {
  public:
   QuotaServiceTest()
       : extension_a_("a"),
         extension_b_("b"),
         extension_c_("c"),
         loop_(),
         ui_thread_(BrowserThread::UI, &loop_) {}
-  virtual void SetUp() { service_.reset(new QuotaService()); }
-  virtual void TearDown() {
+  void SetUp() override { service_.reset(new QuotaService()); }
+  void TearDown() override {
     loop_.RunUntilIdle();
     service_.reset();
   }
 
  protected:
   std::string extension_a_;
   std::string extension_b_;
   std::string extension_c_;
   scoped_ptr<QuotaService> service_;
   base::MessageLoop loop_;
@@ skipping 264 matching lines @@
       "",
       service_->Assess(
           extension_a_, f.get(), &arg, kStartTime + TimeDelta::FromDays(1)));
   EXPECT_NE(
       "",
       service_->Assess(
           extension_a_, g.get(), &arg, kStartTime + TimeDelta::FromDays(1)));
 }
 
 }  // namespace extensions