Add thread checker to FileSystemOperationContext to allow setters called only on initialization thr…

webkit/fileapi/file_system_operation_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/fileapi/file_system_operation_context.h"
 
 #include "base/sequenced_task_runner.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_task_runners.h"
 
 namespace fileapi {
 
 FileSystemOperationContext::FileSystemOperationContext(
     FileSystemContext* context)
     : file_system_context_(context),
       task_runner_(file_system_context_->task_runners()->file_task_runner()),
       allowed_bytes_growth_(0),
       quota_limit_type_(quota::kQuotaLimitTypeUnknown) {}
 
 FileSystemOperationContext::FileSystemOperationContext(
     FileSystemContext* context,
     base::SequencedTaskRunner* task_runner)
     : file_system_context_(context),
       task_runner_(task_runner),
       allowed_bytes_growth_(0),
       quota_limit_type_(quota::kQuotaLimitTypeUnknown) {}
 
-FileSystemOperationContext::~FileSystemOperationContext() {}
+FileSystemOperationContext::~FileSystemOperationContext() {
+  DetachUserDataThread();
+  setter_thread_checker_.DetachFromThread();
+}
 
 }  // namespace fileapi