Extract an independent webkit_support_gfx target.

third_party/zlib/zlib.gyp

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     'conditions': [
       [ 'os_posix == 1 and OS != "mac" and OS != "openbsd"', {
         # Link to system .so since we already use it due to GTK.
         # TODO(pvalchev): OpenBSD is purposefully left out, as the system
@@ skipping 77 matching lines @@
             'USE_SYSTEM_ZLIB',
           ],
           'sources': [
             'contrib/minizip/ioapi.c',
             'contrib/minizip/ioapi.h',
             'contrib/minizip/unzip.c',
             'contrib/minizip/unzip.h',
             'contrib/minizip/zip.c',
             'contrib/minizip/zip.h',
           ],
+          'conditions': [
+            ['OS=="android"', {
+              'toolsets': ['target', 'host'],
+            }],
+          ],
           'link_settings': {
             'libraries': [
               '-lz',
             ],
           },
         },
       ],
     }],
   ],
 }