Lazily prune the multibuffer block cache.

media/cast/test/fake_single_thread_task_runner.h

-// Copyright 2014 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 MEDIA_CAST_TEST_FAKE_TASK_RUNNER_H_
-#define MEDIA_CAST_TEST_FAKE_TASK_RUNNER_H_
-
-#include <map>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/single_thread_task_runner.h"
-#include "base/test/simple_test_tick_clock.h"
-
-namespace media {
-namespace cast {
-namespace test {
-
-class FakeSingleThreadTaskRunner : public base::SingleThreadTaskRunner {
- public:
-  explicit FakeSingleThreadTaskRunner(base::SimpleTestTickClock* clock);
-
-  void RunTasks();
-
-  // Note: Advances |clock_|.
-  void Sleep(base::TimeDelta t);
-
-  // base::SingleThreadTaskRunner implementation.
-  bool PostDelayedTask(const tracked_objects::Location& from_here,
-                       const base::Closure& task,
-                       base::TimeDelta delay) final;
-
-  bool RunsTasksOnCurrentThread() const final;
-
-  // This function is currently not used, and will return false.
-  bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
-                                  const base::Closure& task,
-                                  base::TimeDelta delay) final;
-
- protected:
-  ~FakeSingleThreadTaskRunner() final;
-
- private:
-  base::SimpleTestTickClock* const clock_;
-
-  // A compound key is used to ensure FIFO execution of delayed tasks scheduled
-  // for the same point-in-time.  The second part of the key is simply a FIFO
-  // sequence number.
-  using TaskKey = std::pair<base::TimeTicks, unsigned int>;
-
-  // Note: The std::map data structure was chosen because the entire
-  // cast_unittests suite performed 20% faster than when using
-  // std::priority_queue.  http://crbug.com/530842
-  std::map<TaskKey, base::Closure> tasks_;
-
-  bool fail_on_next_task_;
-
-  DISALLOW_COPY_AND_ASSIGN(FakeSingleThreadTaskRunner);
-};
-
-}  // namespace test
-}  // namespace cast
-}  // namespace media
-
-#endif  // MEDIA_CAST_TEST_FAKE_TASK_RUNNER_H_