Do not delete synchronously in OnTaskRunnerDeleter.

base/sequenced_task_runner.h

 // 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.
 
 #ifndef BASE_SEQUENCED_TASK_RUNNER_H_
 #define BASE_SEQUENCED_TASK_RUNNER_H_
 
 #include "base/base_export.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "base/task_runner.h"
@@ skipping 145 matching lines @@
 
 struct BASE_EXPORT OnTaskRunnerDeleter {
   explicit OnTaskRunnerDeleter(scoped_refptr<SequencedTaskRunner> task_runner);
   ~OnTaskRunnerDeleter();
 
   OnTaskRunnerDeleter(OnTaskRunnerDeleter&&);
   OnTaskRunnerDeleter& operator=(OnTaskRunnerDeleter&&);
 
   template <typename T>
   void operator()(const T* ptr) {
-    if (task_runner_->RunsTasksOnCurrentThread())
-      delete ptr;
-    else if (ptr)
+    if (ptr)
       task_runner_->DeleteSoon(FROM_HERE, ptr);
   }
 
   scoped_refptr<SequencedTaskRunner> task_runner_;
 };
 
 }  // namespace base
 
 #endif  // BASE_SEQUENCED_TASK_RUNNER_H_