[Extensions] Un-refcount PermissionSet

chrome/browser/background/background_application_list_model.cc

 // Copyright (c) 2012 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/background/background_application_list_model.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/stl_util.h"
@@ skipping 345 matching lines @@
     const Extension* extension) {
   if (!IsBackgroundApp(*extension, profile_))
     return;
   Update();
   DissociateApplicationData(extension);
 }
 
 void BackgroundApplicationListModel::OnExtensionPermissionsUpdated(
     const Extension* extension,
     UpdatedExtensionPermissionsInfo::Reason reason,
-    const PermissionSet* permissions) {
-  if (permissions->HasAPIPermission(APIPermission::kBackground)) {
+    const PermissionSet& permissions) {
+  if (permissions.HasAPIPermission(APIPermission::kBackground)) {
     switch (reason) {
       case UpdatedExtensionPermissionsInfo::ADDED:
         DCHECK(IsBackgroundApp(*extension, profile_));
         OnExtensionLoaded(extension);
         break;
       case UpdatedExtensionPermissionsInfo::REMOVED:
         DCHECK(!IsBackgroundApp(*extension, profile_));
         Update();
         DissociateApplicationData(extension);
         break;
@@ skipping 26 matching lines @@
          (*old_cursor)->name() == (*new_cursor)->name() &&
          (*old_cursor)->id() == (*new_cursor)->id()) {
     ++old_cursor;
     ++new_cursor;
   }
   if (old_cursor != extensions_.end() || new_cursor != extensions.end()) {
     extensions_ = extensions;
     FOR_EACH_OBSERVER(Observer, observers_, OnApplicationListChanged(profile_));
   }
 }