Worklet: Introduce "pending tasks struct" concept defined in the Worklet spec

third_party/WebKit/Source/core/workers/ThreadedWorklet.h

 // Copyright 2017 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 ThreadedWorklet_h
 #define ThreadedWorklet_h
 
 #include "core/workers/Worklet.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
@@ skipping 16 matching lines @@
   WTF_MAKE_NONCOPYABLE(ThreadedWorklet);
 
  public:
   virtual ~ThreadedWorklet() = default;
 
   // Called when addModule() is called for the first time.
   virtual void Initialize() = 0;
   virtual bool IsInitialized() const = 0;
 
   // Worklet
-  ScriptPromise addModule(ScriptState*, const String& url) final;
+  ScriptPromise addModule(ScriptState*, const String& module_url) final;
 
   // WorkletScriptLoader::Client
   void NotifyWorkletScriptLoadingFinished(WorkletScriptLoader*,
                                           const ScriptSourceCode&) final;
 
   // ContextLifecycleObserver
   void ContextDestroyed(ExecutionContext*) final;
 
   DECLARE_VIRTUAL_TRACE();
 
  protected:
   explicit ThreadedWorklet(LocalFrame*);
 
  private:
   HeapHashMap<Member<WorkletScriptLoader>, Member<ScriptPromiseResolver>>
       loader_to_resolver_map_;
 };
 
 }  // namespace blink
 
 #endif  // ThreadedWorklet_h