Refactoring WorkletThreadBackingHolder with template pattern

third_party/WebKit/Source/core/workers/WorkletBackingThreadHolder.h

Index: third_party/WebKit/Source/core/workers/WorkletBackingThreadHolder.h
diff --git a/third_party/WebKit/Source/core/workers/WorkletBackingThreadHolder.h b/third_party/WebKit/Source/core/workers/WorkletBackingThreadHolder.h
deleted file mode 100644
index 2f47c61734dda64b74139cabff3bdf08246560a3..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/workers/WorkletBackingThreadHolder.h
+++ /dev/null
@@ -1,32 +0,0 @@
-// 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.
-
-#ifndef WorkletBackingThreadHolder_h
-#define WorkletBackingThreadHolder_h
-
-#include "core/CoreExport.h"
-#include "wtf/PtrUtil.h"
-
-namespace blink {
-
-class WorkerBackingThread;
-class WaitableEvent;
-
-class CORE_EXPORT WorkletBackingThreadHolder {
- public:
-  WorkerBackingThread* thread() { return m_thread.get(); }
-
- protected:
-  explicit WorkletBackingThreadHolder(std::unique_ptr<WorkerBackingThread>);
-  virtual void initializeOnThread() = 0;
-  void shutdownAndWait();
-  void shutdownOnThread(WaitableEvent*);
-
-  std::unique_ptr<WorkerBackingThread> m_thread;
-  bool m_initialized;
-};
-
-}  // namespace blink
-
-#endif  // WorkletBackingThreadHolder_h