Create a new FileSystemOperationRunner for each FileAPIMessageFilter

webkit/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 "webkit/browser/fileapi/file_system_context.h"
 
 #include "base/bind.h"
 #include "base/single_thread_task_runner.h"
 #include "base/stl_util.h"
 #include "base/task_runner_util.h"
@@ skipping 308 matching lines @@
     const FileSystemURL& url,
     int64 offset) {
   if (!url.is_valid())
     return scoped_ptr<FileStreamWriter>();
   FileSystemBackend* backend = GetFileSystemBackend(url.type());
   if (!backend)
     return scoped_ptr<FileStreamWriter>();
   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());
   DCHECK(tracker.get());
   change_tracker_ = tracker.Pass();
   sandbox_backend_->AddFileUpdateObserver(
       kFileSystemTypeSyncable,
       change_tracker_.get(),
       task_runners_->file_task_runner());
   sandbox_backend_->AddFileChangeObserver(
@@ skipping 111 matching lines @@
     FileSystemType type = static_cast<FileSystemType>(t);
     if (backend->CanHandleType(type)) {
       const bool inserted = backend_map_.insert(
           std::make_pair(type, backend)).second;
       DCHECK(inserted);
     }
   }
 }
 
 }  // namespace fileapi