Added ROBUST_PNG_CODEC to ImageDecoder

chrome/common/chrome_utility_messages.h

Index: chrome/common/chrome_utility_messages.h
diff --git a/chrome/common/chrome_utility_messages.h b/chrome/common/chrome_utility_messages.h
index b40545104066fcc91306fe51d03177359bb7da81..6e948504347fb450ac4c604bd27039a574ffd9dd 100644
--- a/chrome/common/chrome_utility_messages.h
+++ b/chrome/common/chrome_utility_messages.h
@@ -152,6 +152,11 @@ IPC_MESSAGE_CONTROL3(ChromeUtilityMsg_DecodeImage,
 IPC_MESSAGE_CONTROL2(ChromeUtilityMsg_RobustJPEGDecodeImage,
                      std::vector<unsigned char> /* encoded image contents*/,
                      int /* delegate id */)
+// Tell the utility process to decode the given PNG image data with a robust
+// libpng codec.
+IPC_MESSAGE_CONTROL2(ChromeUtilityMsg_RobustPNGDecodeImage,
+                     std::vector<unsigned char> /* encoded image contents*/,
+                     int /* delegate id */)
 #endif  // defined(OS_CHROMEOS)
 
 // Tell the utility process to patch the given |input_file| using |patch_file|