Add EncodeRGBAPNGWithChecksum method.

webkit/support/webkit_support_gfx.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 "build/build_config.h"
 #include "webkit/support/webkit_support_gfx.h"
 
 #include <stdlib.h>
 #include <string.h>
 
@@ skipping 658 matching lines @@
                                bool discard_transparency,
                                const std::string& checksum,
                                std::vector<unsigned char>* output) {
   std::vector<Comment> comments;
   comments.push_back(Comment("checksum", checksum));
   return Encode(input, FORMAT_BGRA,
       width, height, row_byte_width, discard_transparency,
       comments, output);
 }
 
+bool EncodeRGBAPNGWithChecksum(const unsigned char* input,
+                               int width,
+                               int height,
+                               int row_byte_width,
+                               bool discard_transparency,
+                               const std::string& checksum,
+                               std::vector<unsigned char>* output) {
+  std::vector<Comment> comments;
+  comments.push_back(Comment("checksum", checksum));
+  return Encode(input, FORMAT_RGBA,
+      width, height, row_byte_width, discard_transparency,
+      comments, output);
+}
+
 }  // namespace webkit_support