Refactor Worklet class to use ScriptResource

third_party/WebKit/Source/modules/worklet/WorkletScriptLoader.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 WorkletScriptLoader_h
+#define WorkletScriptLoader_h
+
+#include "bindings/core/v8/ScriptPromiseResolver.h"
+#include "core/fetch/ResourceClient.h"
+#include "core/fetch/ResourceOwner.h"
+#include "core/fetch/ScriptResource.h"
+
+namespace blink {
+
+class Worklet;
+
+// Class that is responsible for processing {@code resource} that is associated with worklet's import promise.
+class WorkletScriptLoader final : public GarbageCollectedFinalized<WorkletScriptLoader>, public ResourceOwner<ScriptResource, ScriptResourceClient> {
+    USING_GARBAGE_COLLECTED_MIXIN(WorkletScriptLoader);
+    WTF_MAKE_NONCOPYABLE(WorkletScriptLoader);
+public:
+    static WorkletScriptLoader* create(ScriptPromiseResolver* scriptPromiseResolver, Worklet* worklet, ScriptResource* resource)
+    {
+        return new WorkletScriptLoader(scriptPromiseResolver, worklet, resource);
+    }
+
+    ~WorkletScriptLoader() override = default;
+
+    // Cancels loading of {@code m_resource}.
+    //
+    // Typically it gets called when WorkletScriptLoader's host is about to be disposed off.
+    void cancel();
+
+    DECLARE_TRACE();
+
+private:
+    // Default constructor.
+    //
+    // @param resolver Promise resolver that is used to reject/resolve the promise on ScriptResourceClient::notifyFinished event.
+    // @param host Host that needs be notified when the resource is downloaded.
+    // @param resource that needs to be downloaded.
+    WorkletScriptLoader(ScriptPromiseResolver*, Worklet* host, ScriptResource*);
+
+    // ResourceClient
+    void notifyFinished(Resource*) final;
+    String debugName() const final { return "WorkletLoader"; }
+
+    Member<ScriptPromiseResolver> m_resolver;
+    Member<Worklet> m_host;
+};
+
+} // namespace blink
+
+#endif // WorkletScriptLoader_h