Report expected task queueing time via UMA

components/scheduler/base/test_always_fail_time_source.h

Index: components/scheduler/base/test_always_fail_time_source.h
diff --git a/components/scheduler/base/test_always_fail_time_source.h b/components/scheduler/base/test_always_fail_time_source.h
deleted file mode 100644
index ec6e73ddf81a05e513c9f4ad0da0c23d7055f1ba..0000000000000000000000000000000000000000
--- a/components/scheduler/base/test_always_fail_time_source.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// 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 COMPONENTS_SCHEDULER_BASE_TEST_ALWAYS_FAIL_TIME_SOURCE_H_
-#define COMPONENTS_SCHEDULER_BASE_TEST_ALWAYS_FAIL_TIME_SOURCE_H_
-
-#include "base/macros.h"
-#include "base/time/tick_clock.h"
-
-namespace scheduler {
-
-class TestAlwaysFailTimeSource : public base::TickClock {
- public:
-  explicit TestAlwaysFailTimeSource();
-  ~TestAlwaysFailTimeSource() override;
-
-  base::TimeTicks NowTicks() override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(TestAlwaysFailTimeSource);
-};
-
-}  // namespace scheduler
-
-#endif  // COMPONENTS_SCHEDULER_BASE_TEST_ALWAYS_FAIL_TIME_SOURCE_H_