hide Config in SkImageDecoder -- use SkColorType instead

experimental/PdfViewer/chop_transparency_main.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 "SkBitmap.h"
 #include "SkColorPriv.h"
 #include "SkCommandLineFlags.h"
@@ skipping 90 matching lines @@
 
     SkImageDecoder* codec = SkImageDecoder::Factory(&stream);
     if (NULL == codec) {
         return;
     }
 
     SkAutoTDelete<SkImageDecoder> ad(codec);
 
     stream.rewind();
 
-    if (!codec->decode(&stream, &bitmap, SkBitmap::kARGB_8888_Config,
-                       SkImageDecoder::kDecodePixels_Mode)) {
+    if (!codec->decode(&stream, &bitmap, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode)) {
         return;
     }
 
     write_bitmap(srcPath, bitmap);
 }
 
 /**
  *  Return true if the filename represents an image.
  */
 static bool is_image_file(const char* filename) {
@@ skipping 44 matching lines @@
     }
 
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif