[CSS Paint API] Add StylePropertyMap as an argument to the paint function.

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 "platform/geometry/IntSize.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class Document;
 class Image;
+class LayoutObject;
 
 // 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&, Observer*);
     virtual ~CSSPaintImageGenerator();
 
     typedef CSSPaintImageGenerator* (*CSSPaintImageGeneratorCreateFunction)(const String&, 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 IntSize&) = 0;
+    virtual PassRefPtr<Image> paint(const LayoutObject&, const IntSize&) = 0;
 
     virtual const Vector<CSSPropertyID>& nativeInvalidationProperties() const = 0;
     virtual const Vector<AtomicString>& customInvalidationProperties() const = 0;
 
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 };
 
 } // namespace blink
 
 #endif // CSSPaintImageGenerator_h