wip

Author: knopp

DEPS

@@ -446,7 +446,7 @@ deps = {
   Var('flutter_git') + '/third_party/ocmock' + '@' +  Var('ocmock_rev'),
 
   'engine/src/flutter/third_party/libpng':
-  Var('flutter_git') + '/third_party/libpng' + '@' + 'de36b892e921c684ef718fec24739ae9bb49c977',
+  Var('flutter_git') + '/third_party/libpng' + '@' + 'f139fd5d80944f5453b079672e50f32ca98ef076',
 
   'engine/src/flutter/third_party/zlib':
   Var('chromium_git') + '/chromium/src/third_party/zlib.git' + '@' + '7d77fb7fd66d8a5640618ad32c71fdeb7d3e02df',