Delete the GTK+ port of Chrome.

chrome/chrome_browser_extensions.gypi

 # Copyright (c) 2013 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_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 510 matching lines @@
         'browser/extensions/api/system_cpu/cpu_info_provider_android.cc',
         'browser/extensions/api/system_cpu/cpu_info_provider_linux.cc',
         'browser/extensions/api/system_cpu/cpu_info_provider_mac.cc',
         'browser/extensions/api/system_cpu/cpu_info_provider_win.cc',
         'browser/extensions/api/system_cpu/system_cpu_api.cc',
         'browser/extensions/api/system_cpu/system_cpu_api.h',
         'browser/extensions/api/system_display/display_info_provider.cc',
         'browser/extensions/api/system_display/display_info_provider.h',
         'browser/extensions/api/system_display/display_info_provider_aura.cc',
         'browser/extensions/api/system_display/display_info_provider_chromeos.cc',
-        'browser/extensions/api/system_display/display_info_provider_gtk.cc',
         'browser/extensions/api/system_display/display_info_provider_mac.cc',
         'browser/extensions/api/system_display/display_info_provider_win.cc',
         'browser/extensions/api/system_display/system_display_api.cc',
         'browser/extensions/api/system_display/system_display_api.h',
         'browser/extensions/api/system_indicator/system_indicator_api.h',
         'browser/extensions/api/system_indicator/system_indicator_manager.cc',
         'browser/extensions/api/system_indicator/system_indicator_manager.h',
         'browser/extensions/api/system_indicator/system_indicator_manager_factory.cc',
         'browser/extensions/api/system_indicator/system_indicator_manager_factory.h',
         'browser/extensions/api/system_info/system_info_api.cc',
@@ skipping 501 matching lines @@
         ['safe_browsing==1', {
           'defines': [
             'FULL_SAFE_BROWSING',
           ],
         }],
         ['safe_browsing==2', {
           'defines': [
             'MOBILE_SAFE_BROWSING',
           ],
         }],
-        ['toolkit_uses_gtk == 1', {
-          'dependencies': [
-            '../build/linux/system.gyp:dbus',
-            '../build/linux/system.gyp:gconf',
-            '../build/linux/system.gyp:gtk',
-            '../build/linux/system.gyp:gtkprint',
-            '../build/linux/system.gyp:ssl',
-            '../build/linux/system.gyp:x11',
-            '../dbus/dbus.gyp:dbus',
-            '../third_party/undoview/undoview.gyp:undoview',
-          ],
-        }],
         ['configuration_policy==1', {
           'dependencies': [
             '../components/components.gyp:policy',
           ],
         }, {  # configuration_policy==0
           'sources!': [
             'browser/extensions/api/storage/managed_value_store_cache.cc',
             'browser/extensions/api/storage/managed_value_store_cache.h',
             'browser/extensions/api/storage/policy_value_store.cc',
             'browser/extensions/api/storage/policy_value_store.h',
@@ skipping 135 matching lines @@
       'type': 'static_library',
       'sources': [ 'browser/extensions/api/cast_channel/cast_channel.proto' ],
       'variables': {
           'proto_in_dir': 'browser/extensions/api/cast_channel',
           'proto_out_dir': 'chrome/browser/extensions/api/cast_channel',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],  # 'conditions'
 }