Add RetainedRef uses where needed.

storage/browser/fileapi/local_file_stream_reader.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 "storage/browser/fileapi/local_file_stream_reader.h"
 
 #include <stdint.h>
 
 #include "base/files/file_util.h"
 #include "base/files/file_util_proxy.h"
@@ skipping 25 matching lines @@
 
 LocalFileStreamReader::~LocalFileStreamReader() {
 }
 
 int LocalFileStreamReader::Read(net::IOBuffer* buf, int buf_len,
                           const net::CompletionCallback& callback) {
   DCHECK(!has_pending_open_);
   if (stream_impl_)
     return stream_impl_->Read(buf, buf_len, callback);
   return Open(base::Bind(&LocalFileStreamReader::DidOpenForRead,
-                         weak_factory_.GetWeakPtr(),
-                         make_scoped_refptr(buf), buf_len, callback));
+                         weak_factory_.GetWeakPtr(), base::RetainedRef(buf),
+                         buf_len, callback));
 }
 
 int64_t LocalFileStreamReader::GetLength(
     const net::Int64CompletionCallback& callback) {
   const bool posted = base::FileUtilProxy::GetFileInfo(
       task_runner_.get(),
       file_path_,
       base::Bind(&LocalFileStreamReader::DidGetFileInfoForGetLength,
                  weak_factory_.GetWeakPtr(),
                  callback));
@@ skipping 102 matching lines @@
     return;
   }
   if (!VerifySnapshotTime(expected_modification_time_, file_info)) {
     callback.Run(net::ERR_UPLOAD_FILE_CHANGED);
     return;
   }
   callback.Run(file_info.size);
 }
 
 }  // namespace storage