Make the gyp files more cross-platform across the Unices

webkit/tools/pepper_test_plugin/pepper_test_plugin.gyp

 # Copyright (c) 2010 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': 'pepper_test_plugin',
       'dependencies': [
@@ skipping 29 matching lines @@
             'action': [
               '<(PRODUCT_DIR)/<(EXECUTABLE_PREFIX)chrome<(EXECUTABLE_SUFFIX)',
               '--no-sandbox',
               '--internal-pepper',
               '--enable-gpu-plugin',
               '--load-plugin=$(TargetPath)',
               'file://$(ProjectDir)test_page.html',
             ],
           },
         }],
-        ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"', {
+        ['os_posix == 1 and OS != "mac"', {
           'type': 'shared_library',
           'cflags': ['-fvisibility=hidden'],
         }],
-        ['OS=="linux" or OS=="openbsd" or OS=="freebsd" and (target_arch=="x64" or target_arch=="arm") and linux_fpic!=1', {
+        ['os_posix == 1 and OS != "mac" and (target_arch == "x64" or target_arch == "arm") and linux_fpic != 1', {
           'product_name': 'pepper_test_plugin',
           # Shared libraries need -fPIC on x86-64
           'cflags': ['-fPIC'],
           'defines': ['INDEPENDENT_PLUGIN'],
         }, {
           # Dependencies for all other OS/CPU combinations except those above
           'dependencies': [
             '../../../base/base.gyp:base',
             '../../../skia/skia.gyp:skia',
             '../../../gpu/gpu.gyp:pgl',
@@ skipping 16 matching lines @@
       #    'target_name' : 'Chromium',
       #    'type' : 'executable',
       #    'xcode_settings' : {
       #      'ARGUMENTS' : '--renderer-startup-dialog --internal-pepper --no-sandbox file://${SRCROOT}/test_page.html'
       #    },
       #  }],
       #],
     },
   ],
 }