Break StyleImage dependency on LayoutObject

third_party/WebKit/Source/core/css/CSSPaintImageGenerator.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 CSSPaintImageGenerator_h
 #define CSSPaintImageGenerator_h
 
 #include "core/CSSPropertyNames.h"
 #include "core/CoreExport.h"
 #include "core/css/cssom/CSSStyleValue.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class CSSSyntaxDescriptor;
 class Document;
 class Image;
-class LayoutObject;
+class ImageResourceObserver;
 
 // Produces a PaintGeneratedImage from a CSS Paint API callback.
 // https://drafts.css-houdini.org/css-paint-api/
 class CORE_EXPORT CSSPaintImageGenerator
     : public GarbageCollectedFinalized<CSSPaintImageGenerator> {
  public:
   // This observer is used if the paint worklet doesn't have a javascript
   // class registered with the correct name yet.
   // paintImageGeneratorReady is called when the javascript class is
   // registered and ready to use.
   class Observer : public GarbageCollectedFinalized<Observer> {
    public:
     virtual ~Observer(){};
     virtual void PaintImageGeneratorReady() = 0;
     DEFINE_INLINE_VIRTUAL_TRACE() {}
   };
 
   static CSSPaintImageGenerator* Create(const String& name,
-                                        Document&,
+                                        const Document&,
                                         Observer*);
   virtual ~CSSPaintImageGenerator();
 
   typedef CSSPaintImageGenerator* (*CSSPaintImageGeneratorCreateFunction)(
       const String&,
-      Document&,
+      const Document&,
       Observer*);
   static void Init(CSSPaintImageGeneratorCreateFunction);
 
   // Invokes the CSS Paint API 'paint' callback. May return a nullptr
   // representing an invalid image if an error occurred.
-  virtual PassRefPtr<Image> Paint(const LayoutObject&,
+  virtual PassRefPtr<Image> Paint(const ImageResourceObserver&,
                                   const IntSize&,
                                   const CSSStyleValueVector*) = 0;
 
   virtual const Vector<CSSPropertyID>& NativeInvalidationProperties() const = 0;
   virtual const Vector<AtomicString>& CustomInvalidationProperties() const = 0;
   virtual bool HasAlpha() const = 0;
   virtual const Vector<CSSSyntaxDescriptor>& InputArgumentTypes() const = 0;
   virtual bool IsImageGeneratorReady() const = 0;
 
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 };
 
 }  // namespace blink
 
 #endif  // CSSPaintImageGenerator_h