RegionAutoGenerationPolicy  225 Source/core/rendering/RenderFlowThread.cpp RenderRegion* RenderFlowThread::regionAtBlockOffset(LayoutUnit offset, bool extendLastRegion, RegionAutoGenerationPolicy autoGenerationPolicy)
RegionAutoGenerationPolicy  101 Source/core/rendering/RenderFlowThread.h     RenderRegion* regionAtBlockOffset(LayoutUnit, bool extendLastRegion = false, RegionAutoGenerationPolicy = AllowRegionAutoGeneration);