Standardize usage of virtual/override/final in components/

components/keyed_service/content/browser_context_dependency_manager_unittest.cc

 // Copyright 2014 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/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class BrowserContextDependencyManagerUnittests : public ::testing::Test {
  protected:
@@ skipping 15 matching lines @@
 
 class TestService : public BrowserContextKeyedServiceFactory {
  public:
   TestService(const std::string& name,
               std::vector<std::string>* fill_on_shutdown,
               BrowserContextDependencyManager* manager)
       : BrowserContextKeyedServiceFactory("TestService", manager),
         name_(name),
         fill_on_shutdown_(fill_on_shutdown) {}
 
-  virtual KeyedService* BuildServiceInstanceFor(
+  KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* context) const override {
     ADD_FAILURE() << "This isn't part of the tests!";
     return NULL;
   }
 
-  virtual void BrowserContextShutdown(content::BrowserContext* context)
-      override {
+  void BrowserContextShutdown(content::BrowserContext* context) override {
     fill_on_shutdown_->push_back(name_);
   }
 
  private:
   const std::string name_;
   std::vector<std::string>* fill_on_shutdown_;
 };
 
 // Tests that we can deal with a single component.
 TEST_F(BrowserContextDependencyManagerUnittests, SingleCase) {
@@ skipping 109 matching lines @@
   manager()->DestroyBrowserContextServices(NULL);
 
   ASSERT_EQ(6U, shutdown_order()->size());
   EXPECT_STREQ("bottom", (*shutdown_order())[0].c_str());
   EXPECT_STREQ("specialized_service", (*shutdown_order())[1].c_str());
   EXPECT_STREQ("other_intermediary", (*shutdown_order())[2].c_str());
   EXPECT_STREQ("intermediary_service", (*shutdown_order())[3].c_str());
   EXPECT_STREQ("other_root", (*shutdown_order())[4].c_str());
   EXPECT_STREQ("everything_depends_on_me", (*shutdown_order())[5].c_str());
 }