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

third_party/WebKit/Source/modules/csspaint/WindowPaintWorklet.cpp

-// 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.
-
-#include "modules/csspaint/WindowPaintWorklet.h"
-
-#include "core/frame/LocalDOMWindow.h"
-#include "core/frame/LocalFrame.h"
-#include "modules/csspaint/PaintWorklet.h"
-
-namespace blink {
-
-WindowPaintWorklet::WindowPaintWorklet(LocalDOMWindow& window)
-    : Supplement<LocalDOMWindow>(window) {}
-
-const char* WindowPaintWorklet::SupplementName() {
-  return "WindowPaintWorklet";
-}
-
-// static
-WindowPaintWorklet& WindowPaintWorklet::From(LocalDOMWindow& window) {
-  WindowPaintWorklet* supplement = static_cast<WindowPaintWorklet*>(
-      Supplement<LocalDOMWindow>::From(window, SupplementName()));
-  if (!supplement) {
-    supplement = new WindowPaintWorklet(window);
-    ProvideTo(window, SupplementName(), supplement);
-  }
-  return *supplement;
-}
-
-// static
-Worklet* WindowPaintWorklet::paintWorklet(LocalDOMWindow& window) {
-  return From(window).paintWorklet();
-}
-
-PaintWorklet* WindowPaintWorklet::paintWorklet() {
-  if (!paint_worklet_ && GetSupplementable()->GetFrame())
-    paint_worklet_ = PaintWorklet::Create(GetSupplementable()->GetFrame());
-  return paint_worklet_.Get();
-}
-
-DEFINE_TRACE(WindowPaintWorklet) {
-  visitor->Trace(paint_worklet_);
-  Supplement<LocalDOMWindow>::Trace(visitor);
-}
-
-}  // namespace blink