Add more missing closing namespace comments.

third_party/WebKit/Source/modules/filesystem/DOMFileSystem.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 127 matching lines @@
         m_callback->handleEvent(static_cast<FileWriter*>(fileWriterBase));
     }
 private:
     explicit ConvertToFileWriterCallback(FileWriterCallback* callback)
         : m_callback(callback)
     {
     }
     Member<FileWriterCallback> m_callback;
 };
 
-}
+} // namespace
 
 void DOMFileSystem::createWriter(const FileEntry* fileEntry, FileWriterCallback* successCallback, ErrorCallback* errorCallback)
 {
     ASSERT(fileEntry);
 
     if (!fileSystem()) {
         reportError(errorCallback, FileError::create(FileError::ABORT_ERR));
         return;
     }
 
@@ skipping 15 matching lines @@
 }
 
 DEFINE_TRACE(DOMFileSystem)
 {
     DOMFileSystemBase::trace(visitor);
     ActiveDOMObject::trace(visitor);
     visitor->trace(m_rootEntry);
 }
 
 } // namespace blink