Remove use_ibus variable from gyp file.

chrome/chrome_browser_ui.gypi

 # Copyright 2012 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_ui',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 2341 matching lines @@
             ['exclude', 'browser/ui/views/frame/desktop_browser_frame_aura.cc'],
             ['exclude', 'browser/ui/views/frame/desktop_browser_frame_aura.h'],
             ['exclude', 'browser/ui/views/frame/browser_desktop_root_window_host_linux.cc'],
             ['exclude', 'browser/ui/views/frame/browser_desktop_root_window_host_linux.h'],
             ['exclude', 'browser/ui/webui/help/version_updater_basic.cc'],
             ['exclude', 'browser/ui/webui/help/version_updater_basic.h'],
             ['exclude', 'browser/upgrade_detector_impl.cc'],
             ['exclude', 'browser/upgrade_detector_impl.h'],
           ],
         }],
-        ['use_ibus==1', {
-          'dependencies': [
-            '../build/linux/system.gyp:ibus',
-          ],
-        }],
         ['use_cups==1', {
           'dependencies': [
             '../printing/printing.gyp:cups',
           ],
         }],
         ['use_gconf==0', {
           'sources!': [
             'browser/ui/gtk/gconf_titlebar_listener.cc',
             'browser/ui/gtk/gconf_titlebar_listener.h',
           ],
@@ skipping 424 matching lines @@
         }],
         ['enable_message_center==1', {
           'dependencies': [
             '../ui/message_center/message_center.gyp:message_center',
           ],
         }],
       ],
     },
   ],
 }