Delete unused file faketaskrunner.h.

BUG=webrtc:6424

Review-Url: https://codereview.webrtc.org/2633683002
Cr-Commit-Position: refs/heads/master@{#16087}

webrtc/base/BUILD.gn

@@ -735,7 +735,6 @@ if (rtc_include_tests) {
       "fakeclock.h",
       "fakenetwork.h",
       "fakesslidentity.h",
-      "faketaskrunner.h",
       "firewallsocketserver.cc",
       "firewallsocketserver.h",
       "gunit.h",

webrtc/base/faketaskrunner.h

@@ -1,38 +0,0 @@
-/*
- *  Copyright 2011 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.
- */
-
-// A fake TaskRunner for use in unit tests.
-
-#ifndef WEBRTC_BASE_FAKETASKRUNNER_H_
-#define WEBRTC_BASE_FAKETASKRUNNER_H_
-
-#include "webrtc/base/taskparent.h"
-#include "webrtc/base/taskrunner.h"
-
-namespace rtc {
-
-class FakeTaskRunner : public TaskRunner {
- public:
-  FakeTaskRunner() : current_time_(0) {}
-  virtual ~FakeTaskRunner() {}
-
-  virtual void WakeTasks() { RunTasks(); }
-
-  virtual int64_t CurrentTime() {
-    // Implement if needed.
-    return current_time_++;
-  }
-
-  int64_t current_time_;
-};
-
-}  // namespace rtc
-
-#endif  // WEBRTC_BASE_FAKETASKRUNNER_H_