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

webkit/fileapi/file_system_operation_context.cc

Index: webkit/fileapi/file_system_operation_context.cc
diff --git a/webkit/fileapi/file_system_operation_context.cc b/webkit/fileapi/file_system_operation_context.cc
index ae20606fb55a3e6b77d042a8831e5fc7485a8598..15daac777a6e7535f8d378c9f3564419d4226022 100644
--- a/webkit/fileapi/file_system_operation_context.cc
+++ b/webkit/fileapi/file_system_operation_context.cc
@@ -25,6 +25,9 @@ FileSystemOperationContext::FileSystemOperationContext(
       allowed_bytes_growth_(0),
       quota_limit_type_(quota::kQuotaLimitTypeUnknown) {}
 
-FileSystemOperationContext::~FileSystemOperationContext() {}
+FileSystemOperationContext::~FileSystemOperationContext() {
+  DetachUserDataThread();
+  setter_thread_checker_.DetachFromThread();
+}
 
 }  // namespace fileapi