Delete the GTK+ port of Chrome.

chrome/chrome.gyp

 # Copyright (c) 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.
 {
   'variables': {
     'chromium_code': 1,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 172 matching lines @@
             'browser/devtools/devtools_toggle_action.cc',
             'browser/devtools/devtools_toggle_action.h',
             'browser/devtools/devtools_window.cc',
             'browser/devtools/devtools_window.h',
             'browser/devtools/port_forwarding_controller.cc',
             'browser/devtools/port_forwarding_controller.h',
             'browser/devtools/remote_debugging_server.cc',
             'browser/devtools/remote_debugging_server.h',
           ],
           'conditions': [
-            ['toolkit_uses_gtk == 1', {
-              'dependencies': [
-                '../build/linux/system.gyp:gtk',
-              ],
-            }],
             ['OS=="android"', {
               'dependencies!': [
                 '../third_party/libusb/libusb.gyp:libusb',
               ],
               'sources!': [
                 'browser/devtools/adb/android_rsa.cc',
                 'browser/devtools/browser_list_tabcontents_provider.cc',
                 'browser/devtools/devtools_file_system_indexer.cc',
                 'browser/devtools/devtools_target_impl.cc',
                 'browser/devtools/devtools_window.cc',
@@ skipping 98 matching lines @@
             'utility/web_resource_unpacker.h',
           ],
           'include_dirs': [
             '..',
             '<(grit_out_dir)',
           ],
           'export_dependent_settings': [
             'common/extensions/api/api.gyp:chrome_api',
           ],
           'conditions': [
-            ['toolkit_uses_gtk == 1', {
-              'dependencies': [
-                '../build/linux/system.gyp:gtk',
-              ],
-            }],
             ['OS=="win" or OS=="mac"', {
               'sources': [
                 'utility/media_galleries/iapps_xml_utils.cc',
                 'utility/media_galleries/iapps_xml_utils.h',
                 'utility/media_galleries/itunes_library_parser.cc',
                 'utility/media_galleries/itunes_library_parser.h',
                 'utility/media_galleries/picasa_album_table_reader.cc',
                 'utility/media_galleries/picasa_album_table_reader.h',
                 'utility/media_galleries/picasa_albums_indexer.cc',
                 'utility/media_galleries/picasa_albums_indexer.h',
@@ skipping 732 matching lines @@
             'service/service_process.h',
             'service/service_process_prefs.cc',
             'service/service_process_prefs.h',
             'service/service_utility_process_host.cc',
             'service/service_utility_process_host.h',
           ],
           'include_dirs': [
             '..',
           ],
           'conditions': [
-            ['toolkit_uses_gtk == 1', {
-              'dependencies': [
-                '../build/linux/system.gyp:gtk',
-              ],
-            }],
             ['use_cups==1', {
               'dependencies': [
                 '../printing/printing.gyp:cups',
               ],
               'sources': [
                 'service/cloud_print/print_system_cups.cc',
               ],
             }],
             ['OS!="win" and use_cups!=1', {
               'sources': [
                 'service/cloud_print/print_system_dummy.cc',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }