Must pass filtering to picture shader

Change-Id: I820867df80daa1594d6202cad5e8e95c060293fe
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/386838
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
diff --git a/bench/ShaderMaskFilterBench.cpp b/bench/ShaderMaskFilterBench.cpp
index fafe11e..3df7c93 100644
--- a/bench/ShaderMaskFilterBench.cpp
+++ b/bench/ShaderMaskFilterBench.cpp
@@ -33,7 +33,8 @@
     SkPictureRecorder recorder;
     recorder.beginRecording(100, 100)->drawCircle(50, 50, 50, p);
 
-    return recorder.finishRecordingAsPicture()->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat);
+    return recorder.finishRecordingAsPicture()->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
+                                                           SkFilterMode::kNearest);
 }
 
 class ShaderMFBench final : public Benchmark {