Add a basic custom painting facility to Sky

sky/engine/platform/graphics/DisplayList.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 31 matching lines @@
 class SkPictureRecorder;
 
 namespace blink {
 
 class IntSize;
 
 class PLATFORM_EXPORT DisplayList final : public WTF::RefCounted<DisplayList> {
     WTF_MAKE_FAST_ALLOCATED;
     WTF_MAKE_NONCOPYABLE(DisplayList);
 public:
-    DisplayList(const FloatRect&);
+    DisplayList();
     ~DisplayList();
 
-    const FloatRect& bounds() const;
-
     // This entry point will return 0 when the DisplayList is in the
     // midst of recording (i.e., between a beginRecording/endRecording pair)
     // and if no recording has ever been completed. Otherwise it will return
     // the picture created by the last endRecording call.
     SkPicture* picture() const;
 
     SkCanvas* beginRecording(const IntSize&, uint32_t recordFlags = 0);
     bool isRecording() const { return m_recorder; }
     void endRecording();
 
 private:
-    FloatRect m_bounds;
     RefPtr<SkPicture> m_picture;
     OwnPtr<SkPictureRecorder> m_recorder;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_PLATFORM_GRAPHICS_DISPLAYLIST_H_