[Do not submit] Worklet implementation.

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

+// Copyright 2015 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 WorkletMessagingProxy_h
+#define WorkletMessagingProxy_h
+
+#include "platform/heap/Handle.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class CompositorWorkletThread;
+class ExecutionContext;
+class Worklet;
+
+// XXX subclasses may expose a handle on this directly to call from the particular thread (sync).
+class WorkletMessagingProxy {
+    WTF_MAKE_NONCOPYABLE(WorkletMessagingProxy);
+public:
+    static WorkletMessagingProxy* create(Worklet*);
+    virtual ~WorkletMessagingProxy();
+
+    void loadScript(const String& sourceCode);
+private:
+    explicit WorkletMessagingProxy(Worklet*);
+
+    RefPtrWillBePersistent<ExecutionContext> m_executionContext;
+    WeakPersistent<Worklet> m_worklet;
+    RefPtr<CompositorWorkletThread> m_thread;
+};
+
+} // namespace blink
+
+#endif // WorkletMessagingProxy_h