paintingExtent   1383 Source/core/rendering/RenderLayer.cpp         LayoutRect clipRect = paintingExtent(rootLayer, paintDirtyRect, subPixelAccumulation, paintBehavior);
paintingExtent    661 Source/core/rendering/RenderLayer.h     LayoutRect paintingExtent(const RenderLayer* rootLayer, const LayoutRect& paintDirtyRect, const LayoutSize& subPixelAccumulation, PaintBehavior);