add conics to path ops

src/pathops/SkIntersectionHelper.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.
  */
 #include "SkOpContour.h"
 #include "SkOpSegment.h"
 #include "SkPath.h"
 
 #ifdef SK_DEBUG
 #include "SkPathOpsPoint.h"
 #endif
 
 class SkIntersectionHelper {
 public:
     enum SegmentType {
         kHorizontalLine_Segment = -1,
         kVerticalLine_Segment = 0,
         kLine_Segment = SkPath::kLine_Verb,
         kQuad_Segment = SkPath::kQuad_Verb,
+        kConic_Segment = SkPath::kConic_Verb,
         kCubic_Segment = SkPath::kCubic_Verb,
     };
 
     bool advance() {
         fSegment = fSegment->next();
         return fSegment != NULL;
     }
 
     SkScalar bottom() const {
         return bounds().fBottom;
@@ skipping 43 matching lines @@
 
     bool startAfter(const SkIntersectionHelper& after) {
         fSegment = after.fSegment->next();
         return fSegment != NULL;
     }
 
     SkScalar top() const {
         return bounds().fTop;
     }
 
+    SkScalar weight() const {
+        return fSegment->weight();
+    }
+
     SkScalar x() const {
         return bounds().fLeft;
     }
 
     bool xFlipped() const {
         return x() != pts()[0].fX;
     }
 
     SkScalar y() const {
         return bounds().fTop;
     }
 
     bool yFlipped() const {
         return y() != pts()[0].fY;
     }
 
 private:
     SkOpSegment* fSegment;
 };