PartScrollbarDownArrow   93 Source/core/rendering/RenderThemeChromiumAndroid.cpp     IntSize scrollbarSize = blink::Platform::current()->themeEngine()->getSize(blink::WebThemeEngine::PartScrollbarDownArrow);
PartScrollbarDownArrow  115 Source/platform/scroll/ScrollbarThemeGtkOrAura.cpp             paintPart = blink::WebThemeEngine::PartScrollbarDownArrow;