Remove uses of PaintBehaviorFlattenCompositingLayers

sky/engine/core/rendering/PaintPhase.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 37 matching lines @@
     PaintPhaseSelection,
     PaintPhaseTextClip,
     PaintPhaseMask,
     PaintPhaseClippingMask,
 };
 
 enum PaintBehaviorFlags {
     PaintBehaviorNormal = 0,
     // FIXME(sky): Renumber these once we're done deleting them.
     PaintBehaviorForceBlackText = 1 << 1,
-    // FIXME(sky): This is unused. Remove it.
-    PaintBehaviorFlattenCompositingLayers = 1 << 2,
-    PaintBehaviorSkipRootBackground = 1 << 4,
-    PaintBehaviorRootBackgroundOnly = 1 << 5
+    PaintBehaviorSkipRootBackground = 1 << 2,
+    PaintBehaviorRootBackgroundOnly = 1 << 3
 };
 
 typedef unsigned PaintBehavior;
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_RENDERING_PAINTPHASE_H_