There is an unused rowBytes parameter being passed along.

src/gpu/GrTest.cpp

Index: src/gpu/GrTest.cpp
diff --git a/src/gpu/GrTest.cpp b/src/gpu/GrTest.cpp
index 257eefdd487717beaaecd1d67fc9788823d14545..04122e13198a35119cf1fd4c1a14e21a3352ea96 100644
--- a/src/gpu/GrTest.cpp
+++ b/src/gpu/GrTest.cpp
@@ -296,7 +296,7 @@ public:
                              GrPixelConfig readConfig, DrawPreference*,
                              ReadPixelTempDrawInfo*) override { return false; }
 
-    bool onGetWritePixelsInfo(GrSurface* dstSurface, int width, int height, size_t rowBytes,
+    bool onGetWritePixelsInfo(GrSurface* dstSurface, int width, int height,
                               GrPixelConfig srcConfig, DrawPreference*,
                               WritePixelTempDrawInfo*) override { return false; }