Make USE_OPENSSL and USE_NSS mutually exclusive

chrome/chrome_browser.gypi

 # 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': 'browser',
       'type': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 4055 matching lines @@
             'browser/bookmarks/bookmark_menu_controller.h',
             'browser/extensions/extension_tts_api_win.cc',
             'browser/google/google_update.cc',
             'browser/history/history_indexer.idl',
             'browser/history_tab_ui.cc',
             'browser/history_view.cc',
             'browser/ime_input.cc',
             'browser/importer/ie_importer.cc',
           ],
         }],
+        [ 'use_openssl==1', {
+          'sources!': [
+            'browser/importer/nss_decryptor.cc',
+            'browser/importer/nss_decryptor_system_nss.cc',
+            'browser/importer/nss_decryptor_system_nss.h',
+          ],
+        }],
       ],
     },
     {
       'target_name': 'component_extensions',
       'type': 'none',
       'msvs_guid': '50B52703-525F-404C-BFE2-C46D3375D73E',
       'conditions': [
         ['OS=="linux" and chromeos==1 and branding=="Chrome"',{
           'copies': [
             {
@@ skipping 74 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: