Hide fields in SkImageInfo

R=rmistry@google.com
TBR=bsalomon

Author: reed@google.com

Review URL: https://codereview.chromium.org/536003002
diff --git a/tests/PremulAlphaRoundTripTest.cpp b/tests/PremulAlphaRoundTripTest.cpp
index 1e655fb..8bdb770 100644
--- a/tests/PremulAlphaRoundTripTest.cpp
+++ b/tests/PremulAlphaRoundTripTest.cpp
@@ -58,9 +58,8 @@
         }
     }
 
-    SkImageInfo info = bmp.info();
-    info.fColorType = colorType;
-    info.fAlphaType = kUnpremul_SkAlphaType;
+    const SkImageInfo info = SkImageInfo::Make(bmp.width(), bmp.height(),
+                                               colorType, kUnpremul_SkAlphaType);
     canvas->writePixels(info, bmp.getPixels(), bmp.rowBytes(), 0, 0);
 }