Second wave of Win64 warning cleanup

src/utils/SkCanvasStateUtils.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCanvasStateUtils.h"
 
 #include "SkBitmapDevice.h"
@@ skipping 42 matching lines @@
     CanvasBackend type;
     int32_t x, y;
     int32_t width;
     int32_t height;
 
     SkMCState mcState;
 
     union {
         struct {
             RasterConfig config; // pixel format: a value from RasterConfigs.
-            uint32_t rowBytes;   // Number of bytes from start of one line to next.
+            size_t rowBytes;     // Number of bytes from start of one line to next.
             void* pixels;        // The pixels, all (height * rowBytes) of them.
         } raster;
         struct {
             int32_t textureID;
         } gpu;
     };
 };
 
 class SkCanvasState {
 public:
@@ skipping 260 matching lines @@
     }
 
     return canvas.detach();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
 void SkCanvasStateUtils::ReleaseCanvasState(SkCanvasState* state) {
     SkDELETE(state);
 }