Introduce PaintWorkletGlobalScope, rename renderWorklet attribute to paintWorklet.

third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.h

Index: third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.h
diff --git a/third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.h b/third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.h
new file mode 100644
index 0000000000000000000000000000000000000000..fb48bccdbec20fe9ba20f239a7f58c7503807aa5
--- /dev/null
+++ b/third_party/WebKit/Source/modules/csspaint/PaintWorkletGlobalScope.h
@@ -0,0 +1,31 @@
+// 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 PaintWorkletGlobalScope_h
+#define PaintWorkletGlobalScope_h
+
+#include "bindings/core/v8/ScriptValue.h"
+#include "core/dom/ExecutionContext.h"
+#include "modules/worklet/WorkletGlobalScope.h"
+
+namespace blink {
+
+class PaintWorkletGlobalScope : public WorkletGlobalScope {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    static PassRefPtrWillBeRawPtr<PaintWorkletGlobalScope> create(LocalFrame*, const KURL&, const String& userAgent, PassRefPtr<SecurityOrigin>, v8::Isolate*);
+    ~PaintWorkletGlobalScope() override;
+
+    bool isPaintWorkletGlobalScope() const final { return true; }
+    void registerPaint(const String&, ScriptValue) { }
+
+private:
+    PaintWorkletGlobalScope(LocalFrame*, const KURL&, const String& userAgent, PassRefPtr<SecurityOrigin>, v8::Isolate*);
+};
+
+DEFINE_TYPE_CASTS(PaintWorkletGlobalScope, ExecutionContext, context, context->isPaintWorkletGlobalScope(), context.isPaintWorkletGlobalScope());
+
+} // namespace blink
+
+#endif // PaintWorkletGlobalScope_h