Worklet: Enqueue tasks into outsideSetting's event loop

third_party/WebKit/Source/core/workers/MainThreadWorkletGlobalScope.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 MainThreadWorkletGlobalScope_h
 #define MainThreadWorkletGlobalScope_h
 
 #include "core/CoreExport.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/workers/WorkletGlobalScope.h"
 #include "core/workers/WorkletPendingTasks.h"
 #include "public/platform/WebURLRequest.h"
 
 namespace blink {
 
 class ConsoleMessage;
 class LocalFrame;
+class ParentFrameTaskRunners;
 
 class CORE_EXPORT MainThreadWorkletGlobalScope
     : public WorkletGlobalScope,
       public ContextClient {
   USING_GARBAGE_COLLECTED_MIXIN(MainThreadWorkletGlobalScope);
 
  public:
   MainThreadWorkletGlobalScope(LocalFrame*,
                                const KURL&,
                                const String& user_agent,
                                PassRefPtr<SecurityOrigin>,
                                v8::Isolate*);
   ~MainThreadWorkletGlobalScope() override;
   bool IsMainThreadWorkletGlobalScope() const final { return true; }
 
   // WorkerOrWorkletGlobalScope
   void ReportFeature(UseCounter::Feature) override;
   void ReportDeprecation(UseCounter::Feature) override;
   WorkerThread* GetThread() const final;
 
+  // Implementation of the "fetch and invoke a worklet script" algorithm:
+  // https://drafts.css-houdini.org/worklets/#fetch-and-invoke-a-worklet-script
+  // When script evaluation is done or any exception happens, it's notified to
+  // the given WorkletPendingTasks via the parent frame task runners.
   void FetchAndInvokeScript(const KURL& module_url_record,
                             WebURLRequest::FetchCredentialsMode,
+                            ParentFrameTaskRunners*,
                             WorkletPendingTasks*);
+
   void Terminate();
 
   // ExecutionContext
   void AddConsoleMessage(ConsoleMessage*) final;
   void ExceptionThrown(ErrorEvent*) final;
   CoreProbeSink* GetProbeSink() final;
 
   DECLARE_VIRTUAL_TRACE();
 };
 
 DEFINE_TYPE_CASTS(MainThreadWorkletGlobalScope,
                   ExecutionContext,
                   context,
                   context->IsMainThreadWorkletGlobalScope(),
                   context.IsMainThreadWorkletGlobalScope());
 
 }  // namespace blink
 
 #endif  // MainThreadWorkletGlobalScope_h