Fix memory leak in ActiveTabPermissionManager.

chrome/browser/extensions/active_tab_permission_manager.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/extensions/active_tab_permission_manager.h"
 
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_id.h"
@@ skipping 35 matching lines @@
   if (pattern.Parse(web_contents()->GetURL().spec()) !=
           URLPattern::PARSE_SUCCESS) {
     // Pattern parsing could fail if this is an unsupported URL e.g. chrome://.
     return;
   }
 
   APIPermissionSet new_apis;
   new_apis.insert(APIPermission::kTab);
   URLPatternSet new_hosts;
   new_hosts.AddPattern(pattern);
+  scoped_refptr<const PermissionSet> new_permissions =
+      new PermissionSet(new_apis, new_hosts, URLPatternSet());
 
-  extension->UpdateTabSpecificPermissions(
-      tab_id_, new PermissionSet(new_apis, new_hosts, URLPatternSet()));
+  extension->UpdateTabSpecificPermissions(tab_id_, new_permissions);
   granted_extensions_.Insert(extension);
   Send(new ExtensionMsg_UpdateTabSpecificPermissions(GetPageID(),
                                                      tab_id_,
                                                      extension->id(),
                                                      new_hosts));
 }
 
 bool ActiveTabPermissionManager::IsGranted(const Extension* extension) {
   return granted_extensions_.Contains(extension->id());
 }
@@ skipping 38 matching lines @@
 
   Send(new ExtensionMsg_ClearTabSpecificPermissions(tab_id_, extension_ids));
   granted_extensions_.Clear();
 }
 
 int32 ActiveTabPermissionManager::GetPageID() {
   return web_contents()->GetController().GetActiveEntry()->GetPageID();
 }
 
 }  // namespace extensions