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

third_party/WebKit/Source/modules/csspaint/CSSPaintImageGeneratorImpl.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/CSSPaintImageGeneratorImpl.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "modules/csspaint/CSSPaintDefinition.h"
+#include "modules/csspaint/CSSPaintWorklet.h"
 #include "modules/csspaint/PaintWorklet.h"
-#include "modules/csspaint/WindowPaintWorklet.h"
 #include "platform/graphics/Image.h"
 
 namespace blink {
 
 CSSPaintImageGenerator* CSSPaintImageGeneratorImpl::Create(const String& name,
                                                            Document& document,
                                                            Observer* observer) {
-  LocalDOMWindow* dom_window = document.domWindow();
-  PaintWorklet* paint_worklet =
-      WindowPaintWorklet::From(*dom_window).paintWorklet();
+  PaintWorklet* paint_worklet = CSSPaintWorklet::paintWorklet(document);
 
   CSSPaintDefinition* paint_definition = paint_worklet->FindDefinition(name);
   CSSPaintImageGeneratorImpl* generator;
   if (!paint_definition) {
     generator = new CSSPaintImageGeneratorImpl(observer);
     paint_worklet->AddPendingGenerator(name, generator);
   } else {
     generator = new CSSPaintImageGeneratorImpl(paint_definition);
   }
 
@@ skipping 52 matching lines @@
   return definition_;
 }
 
 DEFINE_TRACE(CSSPaintImageGeneratorImpl) {
   visitor->Trace(definition_);
   visitor->Trace(observer_);
   CSSPaintImageGenerator::Trace(visitor);
 }
 
 }  // namespace blink