There is an unused rowBytes parameter being passed along.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1636873002

Review URL: https://codereview.chromium.org/1636873002
diff --git a/src/gpu/GrGpu.cpp b/src/gpu/GrGpu.cpp
index 39d190e..32072b4 100644
--- a/src/gpu/GrGpu.cpp
+++ b/src/gpu/GrGpu.cpp
@@ -268,7 +268,7 @@
 
     return true;
 }
-bool GrGpu::getWritePixelsInfo(GrSurface* dstSurface, int width, int height, size_t rowBytes,
+bool GrGpu::getWritePixelsInfo(GrSurface* dstSurface, int width, int height,
                                GrPixelConfig srcConfig, DrawPreference* drawPreference,
                                WritePixelTempDrawInfo* tempDrawInfo) {
     SkASSERT(drawPreference);
@@ -289,7 +289,7 @@
         }
     }
 
-    if (!this->onGetWritePixelsInfo(dstSurface, width, height, rowBytes, srcConfig, drawPreference,
+    if (!this->onGetWritePixelsInfo(dstSurface, width, height, srcConfig, drawPreference,
                                     tempDrawInfo)) {
         return false;
     }