Create a new FileSystemOperationRunner for each FileAPIMessageFilter

webkit/browser/fileapi/file_system_context.cc

Index: webkit/browser/fileapi/file_system_context.cc
diff --git a/webkit/browser/fileapi/file_system_context.cc b/webkit/browser/fileapi/file_system_context.cc
index 24c505bb8a927d07b4b892768b411f3680c59005..d994263c96e0bdbbc4673e37c6a760c3ad62506a 100644
--- a/webkit/browser/fileapi/file_system_context.cc
+++ b/webkit/browser/fileapi/file_system_context.cc
@@ -326,6 +326,11 @@ scoped_ptr<FileStreamWriter> FileSystemContext::CreateFileStreamWriter(
   return backend->CreateFileStreamWriter(url, offset, this);
 }
 
+scoped_ptr<FileSystemOperationRunner>
+FileSystemContext::CreateFileSystemOperationRunner() {
+  return make_scoped_ptr(new FileSystemOperationRunner(this));
+}
+
 void FileSystemContext::SetLocalFileChangeTracker(
     scoped_ptr<sync_file_system::LocalFileChangeTracker> tracker) {
   DCHECK(!change_tracker_.get());