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

storage/browser/fileapi/plugin_private_file_system_backend.cc

Index: storage/browser/fileapi/plugin_private_file_system_backend.cc
diff --git a/storage/browser/fileapi/plugin_private_file_system_backend.cc b/storage/browser/fileapi/plugin_private_file_system_backend.cc
index f1a1beba41a72110d80bbff9a09d5839a4c1e96e..2eb36ff0d1afab6656e765a481e8b5ee6c7b7b01 100644
--- a/storage/browser/fileapi/plugin_private_file_system_backend.cc
+++ b/storage/browser/fileapi/plugin_private_file_system_backend.cc
@@ -5,8 +5,8 @@
 #include "storage/browser/fileapi/plugin_private_file_system_backend.h"
 
 #include <stdint.h>
-
 #include <map>
+#include <utility>
 
 #include "base/stl_util.h"
 #include "base/synchronization/lock.h"
@@ -182,7 +182,8 @@ FileSystemOperation* PluginPrivateFileSystemBackend::CreateFileSystemOperation(
     base::File::Error* error_code) const {
   scoped_ptr<FileSystemOperationContext> operation_context(
       new FileSystemOperationContext(context));
-  return FileSystemOperation::Create(url, context, operation_context.Pass());
+  return FileSystemOperation::Create(url, context,
+                                     std::move(operation_context));
 }
 
 bool PluginPrivateFileSystemBackend::SupportsStreaming(