cc: Move worker threads to content.

cc/test/test_task_graph_runner.h

+// Copyright 2015 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 CC_TEST_TEST_TASK_GRAPH_RUNNER_H_
+#define CC_TEST_TEST_TASK_GRAPH_RUNNER_H_
+
+#include "base/threading/simple_thread.h"
+#include "cc/resources/task_graph_runner.h"
+
+namespace cc {
+
+class TestTaskGraphRunner : public TaskGraphRunner,
+                            public base::DelegateSimpleThread::Delegate {
+ public:
+  TestTaskGraphRunner();
+  ~TestTaskGraphRunner() override;
+
+  // Overridden from base::DelegateSimpleThread::Delegate:
+  void Run() override;
+
+ private:
+  base::DelegateSimpleThread worker_thread_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestTaskGraphRunner);
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_TEST_TASK_GRAPH_RUNNER_H_