Refactoring WorkletThreadBackingHolder with template pattern

third_party/WebKit/Source/modules/webaudio/AudioWorkletThread.h

 // 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 AudioWorkletThread_h
 #define AudioWorkletThread_h
 
 #include "core/workers/WorkerLoaderProxy.h"
 #include "core/workers/WorkerThread.h"
+#include "core/workers/WorkletThreadHolder.h"
 #include "modules/ModulesExport.h"
 #include <memory>
 
 namespace blink {
 
 class WorkerReportingProxy;
 
 // AudioWorkletThread is a per-frame singleton object that represents the
 // backing thread for the processing of AudioWorkletNode/AudioWorkletProcessor.
 // It is supposed to run an instance of V8 isolate.
 
 class MODULES_EXPORT AudioWorkletThread final : public WorkerThread {
  public:
   static std::unique_ptr<AudioWorkletThread> create(
       PassRefPtr<WorkerLoaderProxy>,
       WorkerReportingProxy&);
   ~AudioWorkletThread() override;
 
   WorkerBackingThread& workerBackingThread() override;
 
   // The backing thread is cleared by clearSharedBackingThread().
   void clearWorkerBackingThread() override {}
 
   bool shouldAttachThreadDebugger() const override { return false; }
 
   // This may block the main thread.
   static void collectAllGarbage();
 
   static void ensureSharedBackingThread();
+  static void clearSharedBackingThread();
+
   static void createSharedBackingThreadForTest();
 
-  static void clearSharedBackingThread();
-
  protected:
   WorkerOrWorkletGlobalScope* createWorkerGlobalScope(
       std::unique_ptr<WorkerThreadStartupData>) final;
 
   bool isOwningBackingThread() const override { return false; }
 
  private:
   explicit AudioWorkletThread(PassRefPtr<WorkerLoaderProxy>,

[nhiroki, 2016/10/27 00:03:35]

Can you remove 'explicit'?

[hongchan, 2016/10/27 17:31:06]

Done.

                               WorkerReportingProxy&);
 };
 
 }  // namespace blink
 
 #endif  // AudioWorkletThread_h