PartScrollbarLeftArrow 100 Source/platform/scroll/ScrollbarThemeGtkOrAura.cpp paintPart = blink::WebThemeEngine::PartScrollbarLeftArrow; PartScrollbarLeftArrow 154 Source/platform/scroll/ScrollbarThemeGtkOrAura.cpp IntSize size = blink::Platform::current()->themeEngine()->getSize(blink::WebThemeEngine::PartScrollbarLeftArrow);