Unit Tests: eliminate stray SkDebugf()s.

tests/YUVTest.cpp

Index: tests/YUVTest.cpp
diff --git a/tests/YUVTest.cpp b/tests/YUVTest.cpp
index 09b6f2a7ef6497a98f884c3cbdc267ac42849e8d..b8c4e3598e1fb2c46db2784931b8c88db5c6ab7a 100644
--- a/tests/YUVTest.cpp
+++ b/tests/YUVTest.cpp
@@ -21,7 +21,7 @@ static void codec_yuv(skiatest::Reporter* reporter,
                   SkISize expectedSizes[3]) {
     SkAutoTDelete<SkStream> stream(resource(path));
     if (!stream) {
-        SkDebugf("Missing resource '%s'\n", path);
+        INFOF(reporter, "Missing resource '%s'\n", path);
         return;
     }
     SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach()));