For *ToFixed, in debug mode, assert that the value is in range.

src/effects/gradients/SkTwoPointConicalGradient.cpp

Index: src/effects/gradients/SkTwoPointConicalGradient.cpp
diff --git a/src/effects/gradients/SkTwoPointConicalGradient.cpp b/src/effects/gradients/SkTwoPointConicalGradient.cpp
index d9fc39c3bc1198bd2d7ed246cf8f96ee4396fb9e..2d151ad1ef765a8033e64aa4c7ea9d37de126303 100644
--- a/src/effects/gradients/SkTwoPointConicalGradient.cpp
+++ b/src/effects/gradients/SkTwoPointConicalGradient.cpp
@@ -129,7 +129,7 @@ SkFixed TwoPtRadialContext::nextT() {
             return TwoPtRadial::kDontDrawT;
         }
     }
-    return SkFloatToFixed(t);
+    return SkFloatPinToFixed(t);
 }
 
 typedef void (*TwoPointConicalProc)(TwoPtRadialContext* rec, SkPMColor* dstC,