Make the gyp files more cross-platform across the Unices

ui/ui_base.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'ui_base',
       'type': '<(library)',
       'dependencies': [
@@ skipping 42 matching lines @@
         'base/ime/composition_text.h',
         'base/ime/composition_underline.h',
         'base/ime/text_input_type.h',
         'base/gtk/gtk_im_context_util.cc',
         'base/gtk/gtk_im_context_util.h',
         'base/range/range.cc',
         'base/range/range.h',
         'base/range/range.mm',
       ],
       'conditions': [
-        ['OS=="linux" or OS=="freebsd" or OS=="openbsd"', {
+        ['toolkit_uses_gtk == 1', {
           'dependencies': [
             '../build/linux/system.gyp:gtk',
             '../build/linux/system.gyp:x11',
             '../build/linux/system.gyp:xext',
           ],
         }],
         ['OS=="win"', {
           'sources': [
             'base/win/ime_input.cc',
             'base/win/ime_input.h',
           ],
         }],
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: