harden pathops for pathological test

src/pathops/SkPathOpsTypes.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 SkPathOpsTypes_DEFINED
 #define SkPathOpsTypes_DEFINED
 
 #include <float.h>  // for FLT_EPSILON
@@ skipping 123 matching lines @@
 }
 
 inline bool approximately_zero_sqrt(double x) {
     return fabs(x) < FLT_EPSILON_SQRT;
 }
 
 inline bool roughly_zero(double x) {
     return fabs(x) < ROUGH_EPSILON;
 }
 
+#if 0  // unused for now
+inline bool way_roughly_zero(double x) {
+    return fabs(x) < WAY_ROUGH_EPSILON;
+}
+#endif
+
 inline bool approximately_zero_inverse(double x) {
     return fabs(x) > FLT_EPSILON_INVERSE;
 }
 
 // OPTIMIZATION: if called multiple times with the same denom, we want to pass 1/y instead
 inline bool approximately_zero_when_compared_to(double x, double y) {
     return x == 0 || fabs(x) < fabs(y * FLT_EPSILON);
 }
 
 // Use this for comparing Ts in the range of 0 to 1. For general numbers (larger and smaller) use
@@ skipping 217 matching lines @@
 */
 inline int SkDSideBit(double x) {
     return 1 << SKDSide(x);
 }
 
 inline double SkPinT(double t) {
     return precisely_less_than_zero(t) ? 0 : precisely_greater_than_one(t) ? 1 : t;
 }
 
 #endif