Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/modules/filesystem/FileWriterBase.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 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "modules/filesystem/FileWriterBase.h"
 
 #include "core/events/ProgressEvent.h"
 #include "core/fileapi/Blob.h"
 #include "core/fileapi/FileError.h"
 #include "public/platform/WebFileWriter.h"
-#include <memory>
 
 namespace blink {
 
 FileWriterBase::~FileWriterBase()
 {
 }
 
-void FileWriterBase::initialize(std::unique_ptr<WebFileWriter> writer, long long length)
+void FileWriterBase::initialize(PassOwnPtr<WebFileWriter> writer, long long length)
 {
     ASSERT(!m_writer);
     ASSERT(length >= 0);
     m_writer = std::move(writer);
     m_length = length;
 }
 
 FileWriterBase::FileWriterBase()
     : m_position(0)
 {
 }
 
 void FileWriterBase::seekInternal(long long position)
 {
     if (position > m_length)
         position = m_length;
     else if (position < 0)
         position = m_length + position;
     if (position < 0)
         position = 0;
     m_position = position;
 }
 
 } // namespace blink