Convert //chrome/browser/chromeos from scoped_ptr to std::unique_ptr

chrome/browser/chromeos/drive/fileapi/webkit_file_stream_reader_impl.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 "chrome/browser/chromeos/drive/fileapi/webkit_file_stream_reader_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/logging.h"
@@ skipping 75 matching lines @@
                  base::Bind(&WebkitFileStreamReaderImpl
                                 ::GetLengthAfterStreamReaderInitialized,
                             weak_ptr_factory_.GetWeakPtr(),
                             callback)));
   return net::ERR_IO_PENDING;
 }
 
 void WebkitFileStreamReaderImpl::OnStreamReaderInitialized(
     const net::CompletionCallback& callback,
     int error,
-    scoped_ptr<ResourceEntry> entry) {
+    std::unique_ptr<ResourceEntry> entry) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK(stream_reader_);
   DCHECK(!callback.is_null());
 
   // TODO(hashimoto): Report ERR_UPLOAD_FILE_CHANGED when modification time
   // doesn't match. crbug.com/346625
   if (error != net::OK) {
     // Found an error. Close the |stream_reader_| and notify it to the caller.
     stream_reader_.reset();
     callback.Run(error);
@@ skipping 34 matching lines @@
     callback.Run(initialization_result);
     return;
   }
 
   DCHECK_GE(file_size_, 0);
   callback.Run(file_size_);
 }
 
 }  // namespace internal
 }  // namespace drive