Make SequencedWorkerPool a TaskRunner

base/task_runner_test_template.cc

Index: base/task_runner_test_template.cc
diff --git a/base/task_runner_test_template.cc b/base/task_runner_test_template.cc
new file mode 100644
index 0000000000000000000000000000000000000000..064eac32c1f118e9bd111afbf7484d0dea460fcb
--- /dev/null
+++ b/base/task_runner_test_template.cc
@@ -0,0 +1,23 @@
+// 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 "base/task_runner_test_template.h"
+
+namespace base {
+
+TaskTracker::TaskTracker() {}
+
+TaskTracker::~TaskTracker() {}
+
+void TaskTracker::RunTask(int i) {
+  AutoLock lock(task_run_counts_lock_);
+  ++task_run_counts_[i];
+}
+
+std::map<int, int> TaskTracker::GetTaskRunCounts() const {
+  AutoLock lock(task_run_counts_lock_);
+  return task_run_counts_;
+}
+
+}  // namespace base