[worklets] Add stub classes for window.animationWorklet

third_party/WebKit/Source/modules/compositorworker/AnimationWorklet.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 PaintWorklet_h
-#define PaintWorklet_h
+#ifndef AnimationWorklet_h
+#define AnimationWorklet_h
 
 #include "modules/ModulesExport.h"
-#include "modules/csspaint/PaintWorkletGlobalScope.h"
 #include "modules/worklet/Worklet.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
-class CSSPaintDefinition;
-class CSSPaintImageGeneratorImpl;
+class ThreadedWorkletGlobalScopeProxy;
+class WorkletGlobalScopeProxy;
 
-class MODULES_EXPORT PaintWorklet final : public Worklet {
-    WTF_MAKE_NONCOPYABLE(PaintWorklet);
+class MODULES_EXPORT AnimationWorklet final : public Worklet {
+    WTF_MAKE_NONCOPYABLE(AnimationWorklet);
 public:
-    static PaintWorklet* create(LocalFrame*, ExecutionContext*);
-    ~PaintWorklet() override;
+    static AnimationWorklet* create(ExecutionContext*);
+    ~AnimationWorklet() override;
 
-    PaintWorkletGlobalScope* workletGlobalScopeProxy() const final;
-    CSSPaintDefinition* findDefinition(const String& name);
-    void addPendingGenerator(const String& name, CSSPaintImageGeneratorImpl*);
+    WorkletGlobalScopeProxy* workletGlobalScopeProxy() const final;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    PaintWorklet(LocalFrame*, ExecutionContext*);
+    AnimationWorklet(ExecutionContext*);
 
-    Member<PaintWorkletGlobalScope> m_paintWorkletGlobalScope;
+    // TODO(ikilpatrick): this will change to a raw ptr once we have a thread.
+    std::unique_ptr<ThreadedWorkletGlobalScopeProxy> m_workletGlobalScopeProxy;
 };
 
 } // namespace blink
 
-#endif // PaintWorklet_h
+#endif // AnimationWorklet_h