PartScrollbarVerticalThumb  143 Source/platform/scroll/ScrollbarThemeGtkOrAura.cpp     blink::Platform::current()->themeEngine()->paint(canvas, scrollbar->orientation() == HorizontalScrollbar ? blink::WebThemeEngine::PartScrollbarHorizontalThumb : blink::WebThemeEngine::PartScrollbarVerticalThumb, state, blink::WebRect(rect), 0);
PartScrollbarVerticalThumb  161 Source/platform/scroll/ScrollbarThemeGtkOrAura.cpp         IntSize size = blink::Platform::current()->themeEngine()->getSize(blink::WebThemeEngine::PartScrollbarVerticalThumb);
PartScrollbarVerticalThumb  151 Source/platform/scroll/ScrollbarThemeOverlay.cpp         part = blink::WebThemeEngine::PartScrollbarVerticalThumb;