[worklets] Add stub classes for window.animationWorklet

third_party/WebKit/Source/modules/worklet/ThreadedWorkletGlobalScopeProxy.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 WebMIDIOptions_h
-#define WebMIDIOptions_h
+#ifndef ThreadedWorkletGlobalScopeProxy_h
+#define ThreadedWorkletGlobalScopeProxy_h
+
+#include "core/workers/WorkletGlobalScopeProxy.h"
 
 namespace blink {
 
-struct WebMIDIOptions {
-    enum class SysexPermission { WithSysex, WithoutSysex };
-
-    explicit WebMIDIOptions(SysexPermission sysex)
-        : sysex(sysex)
+class ThreadedWorkletGlobalScopeProxy : public WorkletGlobalScopeProxy {
+public:
+    void evaluateScript(const String& source, const KURL& scriptURL) final
     {
+        // TODO(ikilpatrick): implement.
     }
 
-    const SysexPermission sysex;
-    // TODO(crbug.com/502127): Add bool software to follow the latest spec.
+    void terminateWorkletGlobalScope() final
+    {
+        // TODO(ikilpatrick): implement.
+    }
 };
 
 } // namespace blink
 
-#endif // WebMIDIOptions_h
+#endif // ThreadedWorkletGlobalScopeProxy_h