[DONT COMMIT] PaintWorklet: Move paintWorklet from 'window' to 'CSS'

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

Index: third_party/WebKit/Source/modules/csspaint/PaintWorklet.h
diff --git a/third_party/WebKit/Source/modules/csspaint/PaintWorklet.h b/third_party/WebKit/Source/modules/csspaint/PaintWorklet.h
index ec7cf2f35b4d90be6fbf72dc013cc896ffd2682c..b490dc108018908acad1ad51b6d79102ffb76a86 100644
--- a/third_party/WebKit/Source/modules/csspaint/PaintWorklet.h
+++ b/third_party/WebKit/Source/modules/csspaint/PaintWorklet.h
@@ -18,10 +18,13 @@ class CSSPaintImageGeneratorImpl;
 
 // Manages a paint worklet:
 // https://drafts.css-houdini.org/css-paint-api/#dom-css-paintworklet
-class MODULES_EXPORT PaintWorklet final : public Worklet {
+class MODULES_EXPORT PaintWorklet final : public Worklet,
+                                          public Supplement<LocalDOMWindow> {
+  USING_GARBAGE_COLLECTED_MIXIN(PaintWorklet);
   WTF_MAKE_NONCOPYABLE(PaintWorklet);
 
  public:
+  static PaintWorklet* From(LocalDOMWindow&);
   static PaintWorklet* Create(LocalFrame*);
   ~PaintWorklet() override;
 
@@ -44,6 +47,8 @@ class MODULES_EXPORT PaintWorklet final : public Worklet {
   // TODO(style-dev): Implement the "document paint definition" concept:
   // https://drafts.css-houdini.org/css-paint-api/#document-paint-definition
   // (https://crbug.com/578252)
+
+  static const char* SupplementName();
 };
 
 }  // namespace blink