Remove SkTMin and SkTMax

Use std::min and std::max everywhere.

SkTPin still exists. We can't use std::clamp yet, and even when
we can, it has undefined behavior with NaN. SkTPin is written
to ensure that we return a value in the [lo, hi] range.

Change-Id: I506852a36e024ae405358d5078a872e2c77fa71e
Docs-Preview: https://skia.org/?cl=269357
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/269357
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/gm/polygonoffset.cpp b/gm/polygonoffset.cpp
index 9f906ac..5210145 100644
--- a/gm/polygonoffset.cpp
+++ b/gm/polygonoffset.cpp
@@ -495,7 +495,7 @@
             int numPtsArray[] = { 5, 7, 8, 20, 100 };
 
             size_t arrayIndex = index - SK_ARRAY_COUNT(PolygonOffsetData::gSimplePoints);
-            arrayIndex = SkTMin(arrayIndex, SK_ARRAY_COUNT(numPtsArray) - 1);
+            arrayIndex = std::min(arrayIndex, SK_ARRAY_COUNT(numPtsArray) - 1);
             SkASSERT(arrayIndex < SK_ARRAY_COUNT(numPtsArray));
             *numPts = numPtsArray[arrayIndex];
             // squash horizontally