[Do not submit] Worklet implementation.

third_party/WebKit/Source/core/dom/ExecutionContext.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2012 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 55 matching lines @@
     // Used to specify whether |isSecureContext| should walk the
     // ancestor tree to decide whether to restrict usage of a powerful
     // feature.
     enum SecureContextCheck {
         StandardSecureContextCheck,
         WebCryptoSecureContextCheck
     };
 
     virtual bool isDocument() const { return false; }
     virtual bool isWorkerGlobalScope() const { return false; }
+    virtual bool isWorkletGlobalScope() const { return false; }
     virtual bool isDedicatedWorkerGlobalScope() const { return false; }
     virtual bool isSharedWorkerGlobalScope() const { return false; }
     virtual bool isServiceWorkerGlobalScope() const { return false; }
     virtual bool isCompositorWorkerGlobalScope() const { return false; }
     virtual bool isJSExecutionForbidden() const { return false; }
 
     virtual bool isContextThread() const { return true; }
 
     SecurityOrigin* securityOrigin();
     ContentSecurityPolicy* contentSecurityPolicy();
@@ skipping 112 matching lines @@
 
     Deque<OwnPtr<SuspendableTask>> m_suspendedTasks;
     bool m_isRunSuspendableTasksScheduled;
 
     ReferrerPolicy m_referrerPolicy;
 };
 
 } // namespace blink
 
 #endif // ExecutionContext_h