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 f33dcc5a75f9d4ad73571764cd3d4a1d1d710f1c..3c3180c2c531586d3c6d37f1c1eb2d12c8eab178 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,