There is an unused rowBytes parameter being passed along.

src/gpu/GrGpu.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGpu.h"
 
@@ skipping 250 matching lines @@
         !this->caps()->isConfigRenderable(tempDrawInfo->fTempSurfaceDesc.fConfig, false)) {
         // If we don't have a fallback to a straight read then fail.
         if (kRequireDraw_DrawPreference == *drawPreference) {
             return false;
         }
         *drawPreference = kNoDraw_DrawPreference;
     }
 
     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);
     SkASSERT(tempDrawInfo);
     SkASSERT(kGpuPrefersDraw_DrawPreference != *drawPreference);
 
     if (GrPixelConfigIsCompressed(dstSurface->desc().fConfig) &&
         dstSurface->desc().fConfig != srcConfig) {
         return false;
     }
 
     if (this->caps()->useDrawInsteadOfPartialRenderTargetWrite() &&
         SkToBool(dstSurface->asRenderTarget()) &&
         (width < dstSurface->width() || height < dstSurface->height())) {
         ElevateDrawPreference(drawPreference, kRequireDraw_DrawPreference);
     }
 
-    if (!this->onGetWritePixelsInfo(dstSurface, width, height, rowBytes, srcConfig, drawPreference,
+    if (!this->onGetWritePixelsInfo(dstSurface, width, height, srcConfig, drawPreference,
                                     tempDrawInfo)) {
         return false;
     }
 
     // Check to see if we're going to request that the caller draw when drawing is not possible.
     if (!dstSurface->asRenderTarget() ||
         !this->caps()->isConfigTexturable(tempDrawInfo->fTempSurfaceDesc.fConfig)) {
         // If we don't have a fallback to a straight upload then fail.
         if (kRequireDraw_DrawPreference == *drawPreference ||
             !this->caps()->isConfigTexturable(srcConfig)) {
@@ skipping 78 matching lines @@
     }
 
     GrVertices::Iterator iter;
     const GrNonInstancedVertices* verts = iter.init(vertices);
     do {
         this->onDraw(args, *verts);
         fStats.incNumDraws();
     } while ((verts = iter.next()));
 }