Introduce PaintWorkletGlobalScope, rename renderWorklet attribute to paintWorklet.

third_party/WebKit/Source/modules/worklet/Worklet.h

Index: third_party/WebKit/Source/modules/worklet/Worklet.h
diff --git a/third_party/WebKit/Source/modules/worklet/Worklet.h b/third_party/WebKit/Source/modules/worklet/Worklet.h
index 5fda2978ac72ae3821c1fd23008edc176ec6c303..2523d28d3b9f36b6345a4c7b666ac365f5f16acc 100644
--- a/third_party/WebKit/Source/modules/worklet/Worklet.h
+++ b/third_party/WebKit/Source/modules/worklet/Worklet.h
@@ -19,29 +19,30 @@ class ExecutionContext;
 class ScriptPromiseResolver;
 class WorkerScriptLoader;
 
-class Worklet final : public GarbageCollectedFinalized<Worklet>, public ScriptWrappable, public ActiveDOMObject {
+class Worklet : public GarbageCollectedFinalized<Worklet>, public ScriptWrappable, public ActiveDOMObject {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(Worklet);
     WTF_MAKE_NONCOPYABLE(Worklet);
 public:
-    // The ExecutionContext argument is the parent document of the Worklet. The
-    // Worklet inherits the url and userAgent, from the document.
-    static Worklet* create(LocalFrame*, ExecutionContext*);
+    virtual WorkletGlobalScope* workletGlobalScope() const = 0;
 
+    // Worklet
     ScriptPromise import(ScriptState*, const String& url);
 
     // ActiveDOMObject
     void stop() final;
 
-    DECLARE_TRACE();
+    DECLARE_VIRTUAL_TRACE();
 
-private:
-    Worklet(LocalFrame*, ExecutionContext*);
+protected:
+    // The ExecutionContext argument is the parent document of the Worklet. The
+    // Worklet inherits the url and userAgent from the document.
+    explicit Worklet(ExecutionContext*);
 
+private:
     void onResponse();
     void onFinished(WorkerScriptLoader*, ScriptPromiseResolver*);
 
-    RefPtrWillBeMember<WorkletGlobalScope> m_workletGlobalScope;
     Vector<RefPtr<WorkerScriptLoader>> m_scriptLoaders;
     HeapVector<Member<ScriptPromiseResolver>> m_resolvers;
 };