Delete unused TaskRunner abstraction.

webrtc/base/taskrunner.h

Index: webrtc/base/taskrunner.h
diff --git a/webrtc/base/taskrunner.h b/webrtc/base/taskrunner.h
deleted file mode 100644
index f59677a8467cf3f0f9a667a7a977bbe6e0174298..0000000000000000000000000000000000000000
--- a/webrtc/base/taskrunner.h
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_BASE_TASKRUNNER_H__
-#define WEBRTC_BASE_TASKRUNNER_H__
-
-#include <stdint.h>
-
-#include <vector>
-
-#include "webrtc/base/checks.h"
-#include "webrtc/base/sigslot.h"
-#include "webrtc/base/taskparent.h"
-
-namespace rtc {
-class Task;
-
-const int64_t kSecToMsec = 1000;
-const int64_t kMsecTo100ns = 10000;
-const int64_t kSecTo100ns = kSecToMsec * kMsecTo100ns;
-
-class TaskRunner : public TaskParent, public sigslot::has_slots<> {
- public:
-  TaskRunner();
-  ~TaskRunner() override;
-
-  virtual void WakeTasks() = 0;
-
-  // Returns the current time in 100ns units.  It is used for
-  // determining timeouts.  The origin is not important, only
-  // the units and that rollover while the computer is running.
-  //
-  // On Windows, GetSystemTimeAsFileTime is the typical implementation.
-  virtual int64_t CurrentTime() = 0;
-
-  void StartTask(Task *task);
-  void RunTasks();
-  void PollTasks();
-
-  void UpdateTaskTimeout(Task* task, int64_t previous_task_timeout_time);
-
-#if RTC_DCHECK_IS_ON
-  bool is_ok_to_delete(Task* task) {
-    return task == deleting_task_;
-  }
-
-  void IncrementAbortCount() {
-    ++abort_count_;
-  }
-
-  void DecrementAbortCount() {
-    --abort_count_;
-  }
-#endif
-
-  // Returns the next absolute time when a task times out
-  // OR "0" if there is no next timeout.
-  int64_t next_task_timeout() const;
-
- protected:
-  // The primary usage of this method is to know if
-  // a callback timer needs to be set-up or adjusted.
-  // This method will be called
-  //  * when the next_task_timeout() becomes a smaller value OR
-  //  * when next_task_timeout() has changed values and the previous
-  //    value is in the past.
-  //
-  // If the next_task_timeout moves to the future, this method will *not*
-  // get called (because it subclass should check next_task_timeout()
-  // when its timer goes off up to see if it needs to set-up a new timer).
-  //
-  // Note that this maybe called conservatively.  In that it may be
-  // called when no time change has happened.
-  virtual void OnTimeoutChange() {
-    // by default, do nothing.
-  }
-
- private:
-  void InternalRunTasks(bool in_destructor);
-  void CheckForTimeoutChange(int64_t previous_timeout_time);
-
-  std::vector<Task *> tasks_;
-  Task *next_timeout_task_ = nullptr;
-  bool tasks_running_ = false;
-#if RTC_DCHECK_IS_ON
-  int abort_count_ = 0;
-  Task* deleting_task_ = nullptr;
-#endif
-
-  void RecalcNextTimeout(Task *exclude_task);
-};
-
-} // namespace rtc
-
-#endif  // TASK_BASE_TASKRUNNER_H__