Add EncodeRGBAPNGWithChecksum method.

webkit/support/webkit_support_gfx.h

 // Copyright (c) 2011 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.
 
 #ifndef WEBKIT_SUPPORT_WEBKIT_SUPPORT_GFX_H_
 #define WEBKIT_SUPPORT_WEBKIT_SUPPORT_GFX_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 20 matching lines @@
                    std::vector<unsigned char>* output);
 
 bool EncodeBGRAPNGWithChecksum(const unsigned char* input,
                                int width,
                                int height,
                                int row_byte_width,
                                bool discard_transparency,
                                const std::string& checksum,
                                std::vector<unsigned char>* 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);
+
 }  // namespace webkit_support
 
 #endif  // WEBKIT_SUPPORT_WEBKIT_SUPPORT_GFX_H_