More Windows 64b compilation warning fixes

src/pdf/SkPDFImage.cpp

 /*
  * Copyright 2010 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkPDFImage.h"
 
 #include "SkBitmap.h"
@@ skipping 408 matching lines @@
         return SkPackARGB4444(SK_AlphaOPAQUE & 0x0F,
                                    r / count, g / count, b / count);
     }
 }
 
 static SkBitmap unpremultiply_bitmap(const SkBitmap& bitmap,
                                      const SkIRect& srcRect) {
     SkBitmap outBitmap;
     outBitmap.setConfig(bitmap.config(), srcRect.width(), srcRect.height());
     outBitmap.allocPixels();
-    size_t dstRow = 0;
+    int dstRow = 0;
 
     outBitmap.lockPixels();
     bitmap.lockPixels();
     switch (bitmap.config()) {
         case SkBitmap::kARGB_4444_Config: {
             for (int y = srcRect.fTop; y < srcRect.fBottom; y++) {
                 uint16_t* dst = outBitmap.getAddr16(0, dstRow);
                 uint16_t* src = bitmap.getAddr16(0, y);
                 for (int x = srcRect.fLeft; x < srcRect.fRight; x++) {
                     uint8_t a = SkGetPackedA4444(src[x]);
@@ skipping 240 matching lines @@
         // but the new catalog wants it compressed.
         if (!getSubstitute()) {
             SkPDFStream* substitute = SkNEW_ARGS(SkPDFImage, (*this));
             setSubstitute(substitute);
             catalog->setSubstitute(this, substitute);
         }
         return false;
     }
     return true;
 }