text size is an SkScalar, Windows reminds me.

gm/imagemagnifier.cpp

Index: gm/imagemagnifier.cpp
diff --git a/gm/imagemagnifier.cpp b/gm/imagemagnifier.cpp
index a5f942d5ccbf96e0d1f7e0a19e56a124aa4d438f..f073e3305a8ff8a310ff32b9b05743b6325f61da 100644
--- a/gm/imagemagnifier.cpp
+++ b/gm/imagemagnifier.cpp
@@ -50,7 +50,7 @@ protected:
             int x = rand.nextULessThan(WIDTH);
             int y = rand.nextULessThan(HEIGHT);
             paint.setColor(rand.nextBits(24) | 0xFF000000);
-            paint.setTextSize(rand.nextULessThan(300));
+            paint.setTextSize(rand.nextRangeScalar(0, 300));
             canvas->drawText(str, strlen(str), SkIntToScalar(x),
                              SkIntToScalar(y), paint);
         }