Run clang-modernize -use-nullptr over src/extensions/.

extensions/common/permissions/media_galleries_permission.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/permissions/media_galleries_permission.h"
 
 #include <set>
 #include <string>
 
 #include "base/logging.h"
@@ skipping 113 matching lines @@
     if (it->permission() == kAllAutoDetectedPermission)
       has_all_auto_detected = true;
     else if (it->permission() == kReadPermission)
       has_read = true;
     else if (it->permission() == kCopyToPermission)
       has_copy_to = true;
     else if (it->permission() == kDeletePermission)
       has_delete = true;
   }
 
-  if (!IsValidPermissionSet(has_read, has_copy_to, has_delete, NULL)) {
+  if (!IsValidPermissionSet(has_read, has_copy_to, has_delete, nullptr)) {
     NOTREACHED();
     return result;
   }
 
   // If |has_all_auto_detected| is false, then Chrome will prompt the user at
   // runtime when the extension call the getMediaGalleries API.
   if (!has_all_auto_detected)
     return result;
   // No access permission case.
   if (!has_read)
@@ skipping 17 matching lines @@
   }
   if (has_delete) {
     result.push_back(PermissionMessage(
         PermissionMessage::kMediaGalleriesAllGalleriesDelete,
         base::string16()));
   }
   return result;
 }
 
 }  // namespace extensions