Standardize usage of virtual/override/final in chrome/browser/extensions/

chrome/browser/extensions/api/sessions/sessions_apitest.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 "chrome/browser/extensions/api/sessions/sessions_api.h"
 
 #include "base/command_line.h"
 #include "base/path_service.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/extensions/api/tabs/tabs_api.h"
@@ skipping 66 matching lines @@
   navigation->set_virtual_url("http://foo/1");
   navigation->set_referrer("referrer");
   navigation->set_title("title");
   navigation->set_page_transition(sync_pb::SyncEnums_PageTransition_TYPED);
 }
 
 } // namespace
 
 class ExtensionSessionsTest : public InProcessBrowserTest {
  public:
-  virtual void SetUpCommandLine(CommandLine* command_line) override;
-  virtual void SetUpOnMainThread() override;
+  void SetUpCommandLine(CommandLine* command_line) override;
+  void SetUpOnMainThread() override;
+
  protected:
   static KeyedService* BuildProfileSyncService(
       content::BrowserContext* profile);
 
   void CreateTestProfileSyncService();
   void CreateTestExtension();
   void CreateSessionModels();
 
   template <class T>
   scoped_refptr<T> CreateFunction(bool has_callback) {
@@ skipping 261 matching lines @@
   // Disable this test in Metro+Ash for now (http://crbug.com/262796).
   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kAshBrowserTests))
     return;
 #endif
 
   ASSERT_TRUE(RunExtensionSubtest("sessions",
                                   "sessions.html")) << message_;
 }
 
 }  // namespace extensions