Move blink scheduler implementation into a component

content/test/test_time_source.h

-// 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 CONTENT_TEST_TEST_TIME_SOURCE_H_
-#define CONTENT_TEST_TEST_TIME_SOURCE_H_
-
-#include "base/memory/ref_counted.h"
-#include "content/child/scheduler/time_source.h"
-
-namespace cc {
-class TestNowSource;
-}
-
-namespace content {
-
-class TestTimeSource : public TimeSource {
- public:
-  explicit TestTimeSource(scoped_refptr<cc::TestNowSource> time_source);
-  ~TestTimeSource() override;
-
-  base::TimeTicks Now() const override;
-
- private:
-  scoped_refptr<cc::TestNowSource> time_source_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestTimeSource);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_TEST_TEST_TIME_SOURCE_H_