Worker: Remove WorkerLoaderProxy for clean-up

third_party/WebKit/Source/modules/compositorworker/AnimationWorkletThread.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 AnimationWorkletThread_h
 #define AnimationWorkletThread_h
 
 #include "modules/ModulesExport.h"
 #include "modules/compositorworker/AbstractAnimationWorkletThread.h"
 #include <memory>
 
 namespace blink {
 
 class WorkerReportingProxy;
 
 class MODULES_EXPORT AnimationWorkletThread final
     : public AbstractAnimationWorkletThread {
  public:
   static std::unique_ptr<AnimationWorkletThread> Create(
-      PassRefPtr<WorkerLoaderProxy>,
+      ThreadableLoadingContext*,
       WorkerReportingProxy&);
   ~AnimationWorkletThread() override;
 
  protected:
   WorkerOrWorkletGlobalScope* CreateWorkerGlobalScope(
       std::unique_ptr<WorkerThreadStartupData>) final;
 
  private:
-  AnimationWorkletThread(PassRefPtr<WorkerLoaderProxy>, WorkerReportingProxy&);
+  AnimationWorkletThread(ThreadableLoadingContext*, WorkerReportingProxy&);
 };
 
 }  // namespace blink
 
 #endif  // AnimationWorkletThread_h