Standardize usage of virtual/override/final in extensions/

extensions/common/manifest_handlers/permissions_parser.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 "extensions/common/manifest_handlers/permissions_parser.h"
 
 #include "base/command_line.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 15 matching lines @@
 
 namespace extensions {
 
 namespace {
 
 namespace keys = manifest_keys;
 namespace errors = manifest_errors;
 
 struct ManifestPermissions : public Extension::ManifestData {
   ManifestPermissions(scoped_refptr<const PermissionSet> permissions);
-  virtual ~ManifestPermissions();
+  ~ManifestPermissions() override;
 
   scoped_refptr<const PermissionSet> permissions;
 };
 
 ManifestPermissions::ManifestPermissions(
     scoped_refptr<const PermissionSet> permissions)
     : permissions(permissions) {
 }
 
 ManifestPermissions::~ManifestPermissions() {
@@ skipping 301 matching lines @@
 // static
 scoped_refptr<const PermissionSet> PermissionsParser::GetOptionalPermissions(
     const Extension* extension) {
   DCHECK(extension->GetManifestData(keys::kOptionalPermissions));
   return static_cast<const ManifestPermissions*>(
              extension->GetManifestData(keys::kOptionalPermissions))
       ->permissions;
 }
 
 }  // namespace extensions