Calculate paint invalidation rect for scrollbars

third_party/WebKit/Source/platform/graphics/GraphicsLayerTest.cpp

 /*
  * Copyright (C) 2012 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 181 matching lines @@
 
     bool isActive() const override { return false; }
     int scrollSize(ScrollbarOrientation) const override { return 100; }
     bool isScrollCornerVisible() const override { return false; }
     IntRect scrollCornerRect() const override { return IntRect(); }
     int visibleWidth() const override { return 10; }
     int visibleHeight() const override { return 10; }
     IntSize contentsSize() const override { return IntSize(100, 100); }
     bool scrollbarsCanBeActive() const override { return false; }
     IntRect scrollableAreaBoundingBox() const override { return IntRect(); }
-    void invalidateScrollbarRect(Scrollbar*, const IntRect&) override { }
-    void invalidateScrollCornerRect(const IntRect&) override { }
+    void scrollControlWasSetNeedsPaintInvalidation() override { }
     bool userInputScrollable(ScrollbarOrientation) const override { return true; }
     bool shouldPlaceVerticalScrollbarOnLeft() const override { return false; }
     int pageStep(ScrollbarOrientation) const override { return 0; }
     IntPoint minimumScrollPosition() const override { return IntPoint(); }
     IntPoint maximumScrollPosition() const override
     {
         return IntPoint(contentsSize().width() - visibleWidth(), contentsSize().height() - visibleHeight());
     }
 
     void setScrollOffset(const IntPoint& scrollOffset, ScrollType) override { m_scrollPosition = scrollOffset; }
@@ skipping 17 matching lines @@
 
     WebDoublePoint scrollPosition(7, 9);
     m_platformLayer->setScrollPositionDouble(scrollPosition);
     m_graphicsLayer->didScroll();
 
     EXPECT_FLOAT_EQ(scrollPosition.x, scrollableArea->scrollPositionDouble().x());
     EXPECT_FLOAT_EQ(scrollPosition.y, scrollableArea->scrollPositionDouble().y());
 }
 
 } // namespace blink