Fix assert in GPU path rendering found by fuzzer.

src/gpu/GrPathUtils.cpp

Index: src/gpu/GrPathUtils.cpp
diff --git a/src/gpu/GrPathUtils.cpp b/src/gpu/GrPathUtils.cpp
index 8e7a01d0915aa74a039c8d8e05abf3540fd4e4c3..1281f4a5ec32baa09ef5f1e7c6e65417489a75e7 100644
--- a/src/gpu/GrPathUtils.cpp
+++ b/src/gpu/GrPathUtils.cpp
@@ -46,6 +46,8 @@ uint32_t GrPathUtils::quadraticPointCount(const SkPoint points[],
     SkScalar d = points[1].distanceToLineSegmentBetween(points[0], points[2]);
     if (d <= tol) {
         return 1;
+    } else if (!SkScalarIsFinite(d)) {
+        return MAX_POINTS_PER_CURVE;
     } else {
         // Each time we subdivide, d should be cut in 4. So we need to
         // subdivide x = log4(d/tol) times. x subdivisions creates 2^(x)
@@ -101,6 +103,8 @@ uint32_t GrPathUtils::cubicPointCount(const SkPoint points[],
     d = SkScalarSqrt(d);
     if (d <= tol) {
         return 1;
+    } else if (!SkScalarIsFinite(d)) {
+        return MAX_POINTS_PER_CURVE;
     } else {
         int temp = SkScalarCeilToInt(SkScalarSqrt(SkScalarDiv(d, tol)));
         int pow2 = GrNextPow2(temp);