Really now... derive DomStorageTaskRunner from base::SequencedTaskRunner.

webkit/dom_storage/dom_storage_task_runner.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/dom_storage/dom_storage_task_runner.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop_proxy.h"
 #include "base/tracked_objects.h"
@@ skipping 22 matching lines @@
     const base::Closure& task,
     int64 delay_ms) {
   return PostDelayedTask(
       from_here, task, base::TimeDelta::FromMilliseconds(delay_ms));
 }
 
 bool DomStorageTaskRunner::RunsTasksOnCurrentThread() const {
   return true;
 }
 
+bool DomStorageTaskRunner::PostNonNestableDelayedTask(
+    const tracked_objects::Location& from_here,
+    const base::Closure& task,
+    base::TimeDelta delay) {
+  return PostDelayedTask(from_here, task, delay);
+}
+
+bool DomStorageTaskRunner::PostNonNestableDelayedTask(
+    const tracked_objects::Location& from_here,
+    const base::Closure& task,
+    int64 delay_ms) {
+  return PostDelayedTask(
+      from_here, task, base::TimeDelta::FromMilliseconds(delay_ms));
+}
+
 // DomStorageWorkerPoolTaskRunner
 
 DomStorageWorkerPoolTaskRunner::DomStorageWorkerPoolTaskRunner(
     base::SequencedWorkerPool* sequenced_worker_pool,
     base::SequencedWorkerPool::SequenceToken sequence_token,
     base::MessageLoopProxy* delayed_task_loop)
     : DomStorageTaskRunner(delayed_task_loop),
       sequenced_worker_pool_(sequenced_worker_pool),
       sequence_token_(sequence_token) {
 }
@@ skipping 33 matching lines @@
 bool MockDomStorageTaskRunner::PostDelayedTask(
     const tracked_objects::Location& from_here,
     const base::Closure& task,
     base::TimeDelta delay) {
   // Squash all delays to zero in our mock.
   return DomStorageTaskRunner::PostDelayedTask(
       from_here, task, base::TimeDelta());
 }
 
 }  // namespace dom_storage