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

chrome/browser/media_galleries/fileapi/device_media_async_file_util.cc

 // Copyright (c) 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/fileapi/device_media_async_file_util.h"
 
 #include "base/callback.h"
 #include "base/files/file_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/task_runner_util.h"
@@ skipping 414 matching lines @@
     const CreateSnapshotFileCallback& callback) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   MTPDeviceAsyncDelegate* delegate = GetMTPDeviceDelegate(url);
   if (!delegate) {
     OnCreateSnapshotFileError(callback, base::File::FILE_ERROR_NOT_FOUND);
     return;
   }
 
   scoped_refptr<base::SequencedTaskRunner> task_runner(context->task_runner());
   base::PostTaskAndReplyWithResult(
-      task_runner,
+      task_runner.get(),
       FROM_HERE,
       base::Bind(&CreateSnapshotFileOnBlockingPool, url.path(), profile_path_),
       base::Bind(&OnSnapshotFileCreatedRunTask,
                  base::Passed(&context),
                  callback,
                  url,
                  validate_media_files()));
 }
 
 scoped_ptr<storage::FileStreamReader>
@@ skipping 61 matching lines @@
       FROM_HERE,
       base::Bind(&MediaPathFilterWrapper::FilterMediaEntries,
                  media_path_filter_wrapper_,
                  file_list),
       base::Bind(&OnDidCheckMediaForReadDirectory, callback, has_more));
 }
 
 bool DeviceMediaAsyncFileUtil::validate_media_files() const {
   return media_path_filter_wrapper_.get() != NULL;
 }