remove unused SkXRay functions

src/core/SkGeometry.h

Index: src/core/SkGeometry.h
diff --git a/src/core/SkGeometry.h b/src/core/SkGeometry.h
index 0b236857a57d62febd91f2eb84d57a5b13b77dac..4da74f247598c36a62f10caba6e609f442732cb5 100644
--- a/src/core/SkGeometry.h
+++ b/src/core/SkGeometry.h
@@ -10,21 +10,6 @@
 
 #include "SkMatrix.h"
 
-/** An XRay is a half-line that runs from the specific point/origin to
-    +infinity in the X direction. e.g. XRay(3,5) is the half-line
-    (3,5)....(infinity, 5)
- */
-typedef SkPoint SkXRay;
-
-/** Given a line segment from pts[0] to pts[1], and an xray, return true if
-    they intersect. Optional outgoing "ambiguous" argument indicates
-    whether the answer is ambiguous because the query occurred exactly at
-    one of the endpoints' y coordinates, indicating that another query y
-    coordinate is preferred for robustness.
-*/
-bool SkXRayCrossesLine(const SkXRay& pt, const SkPoint pts[2],
-                       bool* ambiguous = NULL);
-
 /** Given a quadratic equation Ax^2 + Bx + C = 0, return 0, 1, 2 roots for the
     equation.
 */
@@ -159,36 +144,6 @@ int SkFindCubicMaxCurvature(const SkPoint src[4], SkScalar tValues[3]);
 int SkChopCubicAtMaxCurvature(const SkPoint src[4], SkPoint dst[13],
                               SkScalar tValues[3] = NULL);
 
-/** Given a monotonic cubic bezier, determine whether an xray intersects the
-    cubic.
-    By definition the cubic is open at the starting point; in other
-    words, if pt.fY is equivalent to cubic[0].fY, and pt.fX is to the
-    left of the curve, the line is not considered to cross the curve,
-    but if it is equal to cubic[3].fY then it is considered to
-    cross.
-    Optional outgoing "ambiguous" argument indicates whether the answer is
-    ambiguous because the query occurred exactly at one of the endpoints' y
-    coordinates, indicating that another query y coordinate is preferred
-    for robustness.
- */
-bool SkXRayCrossesMonotonicCubic(const SkXRay& pt, const SkPoint cubic[4],
-                                 bool* ambiguous = NULL);
-
-/** Given an arbitrary cubic bezier, return the number of times an xray crosses
-    the cubic. Valid return values are [0..3]
-    By definition the cubic is open at the starting point; in other
-    words, if pt.fY is equivalent to cubic[0].fY, and pt.fX is to the
-    left of the curve, the line is not considered to cross the curve,
-    but if it is equal to cubic[3].fY then it is considered to
-    cross.
-    Optional outgoing "ambiguous" argument indicates whether the answer is
-    ambiguous because the query occurred exactly at one of the endpoints' y
-    coordinates or at a tangent point, indicating that another query y
-    coordinate is preferred for robustness.
- */
-int SkNumXRayCrossingsForCubic(const SkXRay& pt, const SkPoint cubic[4],
-                               bool* ambiguous = NULL);
-
 enum SkCubicType {
     kSerpentine_SkCubicType,
     kCusp_SkCubicType,