Revert "libpng 1.6.3"

third_party/zlib/zlib.gyp

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'zlib',
-      'toolsets': ['target', 'host'],
       'type': 'static_library',
       'sources': [
         'adler32.c',
         'compress.c',
         'crc32.c',
         'crc32.h',
         'deflate.c',
         'deflate.h',
         'gzclose.c',
         'gzguts.h',
@@ skipping 21 matching lines @@
         '.',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '.',
         ],
       },
       'conditions': [
         ['OS!="win"', {
           'product_name': 'chrome_zlib',
+        }], ['OS=="android"', {
+          'toolsets': ['target', 'host'],
         }],
       ],
     },
     {
       'target_name': 'minizip',
       'type': 'static_library',
       'sources': [
         'contrib/minizip/ioapi.c',
         'contrib/minizip/ioapi.h',
         'contrib/minizip/iowin32.c',
@@ skipping 40 matching lines @@
             ],
           },
           'cflags': [
             '-Wno-parentheses-equality',
           ],
         }],
       ],
     },
   ],
 }