Add RetainedRef uses where needed.

storage/browser/fileapi/file_system_context.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/file_system_context.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <utility>
 
@@ skipping 410 matching lines @@
   if (!backend) {
     callback.Run(base::File::FILE_ERROR_SECURITY);
     return;
   }
   if (!backend->GetQuotaUtil()) {
     callback.Run(base::File::FILE_ERROR_INVALID_OPERATION);
     return;
   }
 
   base::PostTaskAndReplyWithResult(
-      default_file_task_runner(),
-      FROM_HERE,
+      default_file_task_runner(), FROM_HERE,
       // It is safe to pass Unretained(quota_util) since context owns it.
       base::Bind(&FileSystemQuotaUtil::DeleteOriginDataOnFileTaskRunner,
                  base::Unretained(backend->GetQuotaUtil()),
-                 make_scoped_refptr(this),
-                 base::Unretained(quota_manager_proxy()),
-                 origin_url,
-                 type),
+                 base::RetainedRef(this),
+                 base::Unretained(quota_manager_proxy()), origin_url, type),
       callback);
 }
 
 scoped_ptr<storage::FileStreamReader> FileSystemContext::CreateFileStreamReader(
     const FileSystemURL& url,
     int64_t offset,
     int64_t max_bytes_to_read,
     const base::Time& expected_modification_time) {
   if (!url.is_valid())
     return scoped_ptr<storage::FileStreamReader>();
@@ skipping 182 matching lines @@
 
   // TODO(mtomasz): Not all fields should be required for ResolveURL.
   operation_runner()->GetMetadata(
       url, FileSystemOperation::GET_METADATA_FIELD_IS_DIRECTORY |
                FileSystemOperation::GET_METADATA_FIELD_SIZE |
                FileSystemOperation::GET_METADATA_FIELD_LAST_MODIFIED,
       base::Bind(&DidGetMetadataForResolveURL, path, callback, info));
 }
 
 }  // namespace storage