Use rounding when converting desiredScale to a sampleSize

src/codec/SkScaledCodec.cpp

Index: src/codec/SkScaledCodec.cpp
diff --git a/src/codec/SkScaledCodec.cpp b/src/codec/SkScaledCodec.cpp
index cf678db8565d0b131d359b28ab6256379e825971..951ab27b1c73def82b545237fe485e4dab58390a 100644
--- a/src/codec/SkScaledCodec.cpp
+++ b/src/codec/SkScaledCodec.cpp
@@ -87,7 +87,7 @@ SkISize SkScaledCodec::onGetScaledDimensions(float desiredScale) const {
     }
     // sampleSize determines the step size between samples
     // Ex: sampleSize = 2, sample every second pixel in x and y directions
-    int sampleSize = int(1 / desiredScale);
+    int sampleSize = int ((1.0f / desiredScale) + 0.5f);
 
     int scaledWidth = get_scaled_dimension(this->getInfo().width(), sampleSize);
     int scaledHeight = get_scaled_dimension(this->getInfo().height(), sampleSize);