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

chrome/browser/apps/install_chrome_app.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 "chrome/browser/apps/install_chrome_app.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 33 matching lines @@
   WebstoreInstallWithPromptAppsOnly(const std::string& app_id,
                                     Profile* profile,
                                     gfx::NativeWindow parent_window)
       : WebstoreInstallWithPrompt(
             app_id,
             profile,
             parent_window,
             extensions::WebstoreStandaloneInstaller::Callback()) {}
 
  private:
-  virtual ~WebstoreInstallWithPromptAppsOnly() {}
+  ~WebstoreInstallWithPromptAppsOnly() override {}
 
   // extensions::WebstoreStandaloneInstaller overrides:
-  virtual void OnManifestParsed() override;
+  void OnManifestParsed() override;
 
   DISALLOW_COPY_AND_ASSIGN(WebstoreInstallWithPromptAppsOnly);
 };
 
 void WebstoreInstallWithPromptAppsOnly::OnManifestParsed() {
   if (!manifest()->HasKey(extensions::manifest_keys::kApp)) {
     CompleteInstall(extensions::webstore_install::NOT_PERMITTED,
                     kInstallChromeAppErrorNotAnApp);
     return;
   }
@@ skipping 34 matching lines @@
   if (installed_extension)
     return;
 
   WebstoreInstallWithPromptAppsOnly* installer =
       new WebstoreInstallWithPromptAppsOnly(
           app_id, browser->profile(), browser->window()->GetNativeWindow());
   installer->BeginInstall();
 }
 
 }  // namespace install_chrome_app