Convert Pass()→std::move() in //storage

storage/browser/fileapi/sandbox_file_system_backend_delegate.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 "storage/browser/fileapi/sandbox_file_system_backend_delegate.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <vector>
@@ skipping 276 matching lines @@
   const UpdateObserverList* update_observers = GetUpdateObservers(url.type());
   const ChangeObserverList* change_observers = GetChangeObservers(url.type());
   DCHECK(update_observers);
 
   scoped_ptr<FileSystemOperationContext> operation_context(
       new FileSystemOperationContext(context));
   operation_context->set_update_observers(*update_observers);
   operation_context->set_change_observers(
       change_observers ? *change_observers : ChangeObserverList());
 
-  return operation_context.Pass();
+  return operation_context;
 }
 
 scoped_ptr<storage::FileStreamReader>
 SandboxFileSystemBackendDelegate::CreateFileStreamReader(
     const FileSystemURL& url,
     int64_t offset,
     const base::Time& expected_modification_time,
     FileSystemContext* context) const {
   if (!IsAccessValid(url))
     return scoped_ptr<storage::FileStreamReader>();
@@ skipping 386 matching lines @@
   return new ObfuscatedFileUtil(special_storage_policy,
                                 file_system_directory,
                                 env_override,
                                 file_task_runner,
                                 base::Bind(&GetTypeStringForURL),
                                 GetKnownTypeStrings(),
                                 NULL);
 }
 
 }  // namespace storage