Remove implicit conversions from scoped_refptr to T* in chrome/browser/media_galleries/

chrome/browser/media_galleries/linux/mtp_device_task_helper.cc

 // Copyright 2013 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_task_helper.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
@@ skipping 191 matching lines @@
       content::BrowserThread::IO,
       FROM_HERE,
       base::Bind(success_callback, entries, has_more));
 }
 
 void MTPDeviceTaskHelper::OnGetFileInfoToReadBytes(
     const MTPDeviceAsyncDelegate::ReadBytesRequest& request,
     const MtpFileEntry& file_entry,
     bool error) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  DCHECK(request.buf);
+  DCHECK(request.buf.get());
   DCHECK_GE(request.buf_len, 0);
   DCHECK_GE(request.offset, 0);
   if (error) {
     return HandleDeviceError(request.error_callback,
                              base::File::FILE_ERROR_FAILED);
   }
 
   base::File::Info file_info = FileInfoFromMTPFileEntry(file_entry);
   if (file_info.is_directory) {
     return HandleDeviceError(request.error_callback,
@@ skipping 44 matching lines @@
 }
 
 void MTPDeviceTaskHelper::HandleDeviceError(
     const ErrorCallback& error_callback,
     base::File::Error error) const {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   content::BrowserThread::PostTask(content::BrowserThread::IO,
                                    FROM_HERE,
                                    base::Bind(error_callback, error));
 }