[WIP] Plumbing for paint

third_party/WebKit/Source/core/css/CSSPaintImageGenerator.h

Index: third_party/WebKit/Source/core/css/CSSPaintImageGenerator.h
diff --git a/third_party/WebKit/Source/core/css/CSSPaintImageGenerator.h b/third_party/WebKit/Source/core/css/CSSPaintImageGenerator.h
new file mode 100644
index 0000000000000000000000000000000000000000..3c0c0500906d5df2796c710342b1160e896c9c04
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+++ b/third_party/WebKit/Source/core/css/CSSPaintImageGenerator.h
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+// 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 "platform/geometry/IntSize.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class Document;
+class Image;
+
+class CSSPaintImageGenerator : public RefCountedWillBeGarbageCollected<CSSPaintImageGenerator> {
+public:
+    class Observer {
+    public:
+        virtual ~Observer() { };
+        virtual void ready() = 0;
+    };
+
+    static PassRefPtrWillBeRawPtr<CSSPaintImageGenerator> create(const String& name, Document&, Observer*);
+
+    typedef PassRefPtrWillBeRawPtr<CSSPaintImageGenerator> (*CSSPaintImageGeneratorCreateFunction)(const String&, Document&, Observer*);
+    static void init(CSSPaintImageGeneratorCreateFunction);
+
+    virtual PassRefPtr<Image> paint(const IntSize&) = 0;
+
+    DEFINE_INLINE_VIRTUAL_TRACE() { }
+};
+
+} // namespace blink
+
+#endif // CSSPaintImageGenerator_h