Type conversion fixes, ui/gfx/ edition.

ui/gfx/skia_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/skia_util.h"
 
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkColorFilter.h"
 #include "third_party/skia/include/core/SkColorPriv.h"
 #include "third_party/skia/include/core/SkUnPreMultiply.h"
@@ skipping 156 matching lines @@
 }
 
 void ConvertSkiaToRGBA(const unsigned char* skia,
                        int pixel_width,
                        unsigned char* rgba) {
   int total_length = pixel_width * 4;
   for (int i = 0; i < total_length; i += 4) {
     const uint32_t pixel_in = *reinterpret_cast<const uint32_t*>(&skia[i]);
 
     // Pack the components here.
-    int alpha = SkGetPackedA32(pixel_in);
+    SkAlpha alpha = SkGetPackedA32(pixel_in);
     if (alpha != 0 && alpha != 255) {
       SkColor unmultiplied = SkUnPreMultiply::PMColorToColor(pixel_in);
       rgba[i + 0] = SkColorGetR(unmultiplied);
       rgba[i + 1] = SkColorGetG(unmultiplied);
       rgba[i + 2] = SkColorGetB(unmultiplied);
       rgba[i + 3] = alpha;
     } else {
       rgba[i + 0] = SkGetPackedR32(pixel_in);
       rgba[i + 1] = SkGetPackedG32(pixel_in);
       rgba[i + 2] = SkGetPackedB32(pixel_in);
       rgba[i + 3] = alpha;
     }
   }
 }
 
 }  // namespace gfx