Update skia and ui GN builds

third_party/libpng/BUILD.gn

 # Copyright 2014 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.
 
 config("libpng_config") {
   include_dirs = [
     ".",
   ]
 
   defines = [
@@ skipping 11 matching lines @@
   if (is_win) {
     if (component_mode == "shared_library") {
       defines += [
         "PNG_USE_DLL",
         "PNG_NO_MODULEDEF",
       ]
     }
   }
 }
 
-static_library("libpng") {
+source_set("libpng") {
   sources =  [
     "png.c",
     "png.h",
     "pngconf.h",
     "pngerror.c",
     "pnggccrd.c",
     "pngget.c",
     "pngmem.c",
     "pngpread.c",
     "pngread.c",
@@ skipping 14 matching lines @@
   configs += [ "//build/config/compiler:no_chromium_code" ]
 
   forward_dependent_configs_from = [ "//third_party/zlib" ]
 
   direct_dependent_configs = [ ":libpng_config" ]
 
   deps =  [
     "//third_party/zlib",
   ]
 }