add conics to path ops

src/pathops/SkReduceOrder.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkReduceOrder_DEFINED
 #define SkReduceOrder_DEFINED
 
 #include "SkPathOpsCubic.h"
 #include "SkPathOpsLine.h"
 #include "SkPathOpsQuad.h"
 
 union SkReduceOrder {
     enum Quadratics {
         kNo_Quadratics,
         kAllow_Quadratics
     };
 
     int reduce(const SkDCubic& cubic, Quadratics);
     int reduce(const SkDLine& line);
     int reduce(const SkDQuad& quad);
 
+    static SkPath::Verb Conic(const SkPoint pts[3], SkScalar weight, SkPoint* reducePts);
     static SkPath::Verb Cubic(const SkPoint pts[4], SkPoint* reducePts);
     static SkPath::Verb Quad(const SkPoint pts[3], SkPoint* reducePts);
 
     SkDLine fLine;
     SkDQuad fQuad;
     SkDCubic fCubic;
 };
 
 #endif