Get rid of the PaintLayerFlags bitmask.

sky/engine/core/rendering/LayerPaintingInfo.h

Index: sky/engine/core/rendering/LayerPaintingInfo.h
diff --git a/sky/engine/core/rendering/LayerPaintingInfo.h b/sky/engine/core/rendering/LayerPaintingInfo.h
index a77cb10c2273b26402a06b93089b1fcb149b7a31..5a0183c77101ae8abf0b351f761acbced8ef8584 100644
--- a/sky/engine/core/rendering/LayerPaintingInfo.h
+++ b/sky/engine/core/rendering/LayerPaintingInfo.h
@@ -52,13 +52,6 @@ namespace blink {
 
 class RenderLayer;
 
-// FIXME(sky): Get rid of this bitmasking and just use a regular enum.
-enum PaintLayerFlag {
-    PaintLayerPaintingOverlayScrollbars = 1,
-};
-
-typedef unsigned PaintLayerFlags;
-
 struct LayerPaintingInfo {
     LayerPaintingInfo(RenderLayer* inRootLayer, const LayoutRect& inDirtyRect,
         PaintBehavior inPaintBehavior, const LayoutSize& inSubPixelAccumulation,