[proof-of-concept] SW thread independent of the main thread

third_party/WebKit/Source/web/WebIsolatedWorkerImpl.h

Index: third_party/WebKit/Source/web/WebIsolatedWorkerImpl.h
diff --git a/third_party/WebKit/Source/web/WebIsolatedWorkerImpl.h b/third_party/WebKit/Source/web/WebIsolatedWorkerImpl.h
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index 0000000000000000000000000000000000000000..7b14f0451f908e8b78f9f5f994c952c546791d4b
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+++ b/third_party/WebKit/Source/web/WebIsolatedWorkerImpl.h
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+
+#ifndef WebIsolatedWorkerImpl_h
+#define WebIsolatedWorkerImpl_h
+
+#include <memory>
+
+#include "core/workers/WorkerLoaderProxy.h"
+#include "public/platform/WebCommon.h"
+#include "public/web/modules/serviceworker/WebIsolatedWorker.h"
+#include "public/web/WebFrameClient.h"
+
+namespace blink {
+
+class WebIsolatedWorkerContextClient;
+class WorkerBackingThread;
+class WebView;
+class WebLocalFrameImpl;
+class IsolatedWorkerThread;
+class IsolatedWorkerReportingProxy;
+
+class WebIsolatedWorkerImpl : public WebIsolatedWorker {
+public:
+    WebIsolatedWorkerImpl(std::unique_ptr<WebIsolatedWorkerContextClient>);
+    ~WebIsolatedWorkerImpl() override;
+    void startWorker(int64_t versionID, WebURL scopeURL, WebURL scriptURL) override;
+    IsolatedWorkerThread* thread() { return m_workerThread.get(); }
+
+private:
+    class MainThreadProxy final : public ThreadSafeRefCounted<MainThreadProxy>, public WebFrameClient, public WorkerLoaderProxyProvider {
+    public:
+        MainThreadProxy(WebIsolatedWorkerImpl* worker, KURL scopeURL);
+        ~MainThreadProxy();
+        void detach();
+
+    private:
+        void initializeOnMainThread(KURL scopeURL);
+
+        // WorkerLoaderProxyProvider
+        void postTaskToLoader(const WebTraceLocation&, std::unique_ptr<ExecutionContextTask>) override;
+        void postTaskToWorkerGlobalScope(const WebTraceLocation&, std::unique_ptr<ExecutionContextTask>) override;
+
+        // WebFrameClient overrides.
+        void willSendRequest(WebLocalFrame*, WebURLRequest&) override;
+        void didFinishDocumentLoad(WebLocalFrame*) override;
+
+        Mutex m_lock_for_worker;
+        Mutex m_lock_for_document;
+        WebIsolatedWorkerImpl* m_worker = nullptr;
+        KURL m_scopeURL;
+        WebView* m_webView = nullptr;
+        Persistent<WebLocalFrameImpl> m_mainFrame;
+        bool m_shadowPageLoadStarted = false;
+        bool m_shadowPageLoaded = false;
+        std::vector<std::unique_ptr<ExecutionContextTask>> m_pending_tasks;
+    };
+
+    std::unique_ptr<WorkerBackingThread> m_workerBackingThread;
+
+    RefPtr<MainThreadProxy> m_mainThreadProxy;
+    RefPtr<WorkerLoaderProxy> m_loaderProxy;
+    std::unique_ptr<IsolatedWorkerReportingProxy> m_workerGlobalScopeProxy;
+    std::unique_ptr<IsolatedWorkerThread> m_workerThread;
+};
+
+} // namespace blink
+
+#endif // WebIsolatedWorkerImpl_h