PartScrollbarUpArrow  110 Source/platform/scroll/ScrollbarThemeGtkOrAura.cpp             paintPart = blink::WebThemeEngine::PartScrollbarUpArrow;
PartScrollbarUpArrow  149 Source/platform/scroll/ScrollbarThemeGtkOrAura.cpp         IntSize size = blink::Platform::current()->themeEngine()->getSize(blink::WebThemeEngine::PartScrollbarUpArrow);