Media gallery fixups for scoped_refptr<T> operator T* removal.

chrome/browser/media_galleries/linux/mtp_device_delegate_impl_linux.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 "chrome/browser/media_galleries/linux/mtp_device_delegate_impl_linux.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 392 matching lines @@
                                        FROM_HERE,
                                        closure));
 }
 
 bool MTPDeviceDelegateImplLinux::IsStreaming() {
   return true;
 }
 
 void MTPDeviceDelegateImplLinux::ReadBytes(
     const base::FilePath& device_file_path,
-    net::IOBuffer* buf, int64 offset, int buf_len,
+    const scoped_refptr<net::IOBuffer>& buf,
+    int64 offset,
+    int buf_len,
     const ReadBytesSuccessCallback& success_callback,
     const ErrorCallback& error_callback) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   DCHECK(!device_file_path.empty());
   base::Closure closure =
       base::Bind(&MTPDeviceDelegateImplLinux::ReadBytesInternal,
                  weak_ptr_factory_.GetWeakPtr(),
                  device_file_path,
-                 make_scoped_refptr(buf),
+                 buf,
                  offset,
                  buf_len,
                  success_callback,
                  error_callback);
   EnsureInitAndRunTask(PendingTaskInfo(device_file_path,
                                        content::BrowserThread::IO,
                                        FROM_HERE,
                                        closure));
 }
 
@@ skipping 505 matching lines @@
   *id = current_node->file_id();
   return true;
 }
 
 void CreateMTPDeviceAsyncDelegate(
     const std::string& device_location,
     const CreateMTPDeviceAsyncDelegateCallback& callback) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   callback.Run(new MTPDeviceDelegateImplLinux(device_location));
 }