Use SkTPin instead of std::clamp

std::clamp is c++17 so using it causes some builds to fail.

Change-Id: I3e90ffc081e1f18ebab1c4f403826e94e58bf07d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/299878
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>

src/gpu/tessellate/GrStrokeGeometry.cpp

diff --git a/src/gpu/tessellate/GrStrokeGeometry.cpp b/src/gpu/tessellate/GrStrokeGeometry.cpp
index 9ff4c5c..13674ed 100644
--- a/src/gpu/tessellate/GrStrokeGeometry.cpp
+++ b/src/gpu/tessellate/GrStrokeGeometry.cpp
@@ -155,7 +155,7 @@
 
     // Decide how many flat line segments to chop the curve into.
     int numSegments = wangs_formula_quadratic(p0, p1, p2);
-    numSegments = std::clamp(numSegments, 1, 1 << kMaxNumLinearSegmentsLog2);
+    numSegments = SkTPin(numSegments, 1, 1 << kMaxNumLinearSegmentsLog2);
 
     // At + B gives a vector tangent to the quadratic.
     Sk2f A = p0 - p1*2 + p2;
@@ -284,7 +284,7 @@
 
     // Decide how many flat line segments to chop the curve into.
     int numSegments = wangs_formula_cubic(p0, p1, p2, p3);
-    numSegments = std::clamp(numSegments, 1, 1 << kMaxNumLinearSegmentsLog2);
+    numSegments = SkTPin(numSegments, 1, 1 << kMaxNumLinearSegmentsLog2);
 
     // At^2 + Bt + C gives a vector tangent to the cubic. (More specifically, it's the derivative
     // minus an irrelevant scale by 3, since all we care about is the direction.)