replace platform conditions with os_posix and os_bsd where applicable

crypto/crypto.gyp

 # Copyright (c) 2011 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': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 34 matching lines @@
             ],
         }],
         [ 'OS == "android"', {
             'dependencies': [
               '../build/android/system.gyp:ssl',
             ],
             'sources/': [
               ['exclude', 'ec_private_key_nss\.cc$'],
             ],
         }],
-        [ 'OS == "freebsd" or OS == "openbsd"', {
+        [ 'os_bsd==1', {

[wtc, 2011/11/30 01:08:15]

Nit: the prevalent style in this file has spaces before and
after ==.  (It's not worth fixing this.  Just for future
reference.)

           'link_settings': {
             'libraries': [
               '-L/usr/local/lib -lexecinfo',
               ],
             },
           },
         ],
         [ 'OS == "mac"', {
           'link_settings': {
             'libraries': [
@@ skipping 186 matching lines @@
         [ 'use_openssl==1', {
           'sources!': [
             'openpgp_symmetric_encryption_unittest.cc',
             'rsa_private_key_nss_unittest.cc',
           ],
         }],
       ],
     },
   ],
 }