Perform BSP polygon splitting and orientation selection in a single step.

cc/output/bsp_tree.h

Index: cc/output/bsp_tree.h
diff --git a/cc/output/bsp_tree.h b/cc/output/bsp_tree.h
index 3c703d21a267e1537fd8f165f80131e6b24fe348..65c601b4a94b2ca85069ae2a306a277439c29784 100644
--- a/cc/output/bsp_tree.h
+++ b/cc/output/bsp_tree.h
@@ -101,10 +101,6 @@ class CC_EXPORT BspTree {
     }
   }
 
-  // Returns whether or not nodeA is on one or the other side of nodeB,
-  // coplanar, or whether it crosses nodeB's plane and needs to be split
-  static BspCompareResult GetNodePositionRelative(const DrawPolygon& node_a,
-                                                  const DrawPolygon& node_b);
   // Returns whether or not our viewer is in front of or behind the plane
   // defined by this polygon/node
   static BspCompareResult GetCameraPositionRelative(const DrawPolygon& node);