scheduler: Move the Blink scheduler into Blink

components/scheduler/test/renderer_scheduler_test_support.cc

-// Copyright 2016 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.
-
-#include "components/scheduler/test/renderer_scheduler_test_support.h"
-
-#include "components/scheduler/renderer/renderer_scheduler_impl.h"
-
-namespace scheduler {
-
-void RunIdleTasksForTesting(
-    RendererScheduler* scheduler,
-    const base::Closure& callback) {
-  RendererSchedulerImpl* scheduler_impl = static_cast<RendererSchedulerImpl*>(
-      scheduler);
-  scheduler_impl->RunIdleTasksForTesting(callback);
-}
-
-} // namespace scheduler