Support building BoringSSL with NSS certificates.

chrome/chrome_utility.gypi

 # 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.
 
 {
   'variables': {
     'chrome_utility_sources': [
       'utility/chrome_content_utility_client.cc',
       'utility/chrome_content_utility_client.h',
       'utility/chrome_content_utility_ipc_whitelist.cc',
@@ skipping 115 matching lines @@
               'VCLinkerTool': {
                 'DelayLoadDLLs': [
                   # Prevent wininet from loading in the renderer.
                   # http://crbug.com/460679
                   'wininet.dll',
                 ],
               },
             },
           },
         }],
-        ['OS!="win" and OS!="mac" and use_openssl==1', {
-          'sources!': [
-            'utility/importer/nss_decryptor.cc',
-          ]
+        ['OS!="android"', {
+          'sources': [
+            '<@(chrome_utility_importer_sources)',
+          ],
         }],
-        ['OS!="win" and OS!="mac" and use_openssl==0', {
+        ['use_nss==1', {
           'dependencies': [
             '../crypto/crypto.gyp:crypto',
           ],
           'sources': [
             'utility/importer/nss_decryptor_system_nss.cc',
             'utility/importer/nss_decryptor_system_nss.h',
           ],
         }],
-        ['OS!="android"', {
-          'sources': [
-            '<@(chrome_utility_importer_sources)',
-          ],
-        }],
         ['enable_extensions==1', {
           'dependencies': [
             '../extensions/extensions.gyp:extensions_utility',
             '../third_party/libexif/libexif.gyp:libexif',
             'common/extensions/api/api.gyp:chrome_api',
           ],
           'export_dependent_settings': [
             'common/extensions/api/api.gyp:chrome_api',
           ],
           'sources': [
@@ skipping 34 matching lines @@
         }],
         ['safe_browsing==1', {
           'defines': [ 'FULL_SAFE_BROWSING' ],
         }],
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ],
 }