Delete the GTK+ port of Chrome.

content/content_common.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../gpu/command_buffer/command_buffer.gyp:gles2_utils',
     '../net/net.gyp:net',
@@ skipping 154 matching lines @@
     'common/content_switches_internal.cc',
     'common/content_switches_internal.h',
     'common/cookie_data.cc',
     'common/cookie_data.h',
     'common/cursors/webcursor.cc',
     'common/cursors/webcursor.h',
     'common/cursors/webcursor_android.cc',
     'common/cursors/webcursor_aura.cc',
     'common/cursors/webcursor_aurawin.cc',
     'common/cursors/webcursor_aurax11.cc',
-    'common/cursors/webcursor_gtk.cc',
-    'common/cursors/webcursor_gtk_data.h',
     'common/cursors/webcursor_mac.mm',
     'common/cursors/webcursor_ozone.cc',
     'common/cursors/webcursor_win.cc',
     'common/database_messages.h',
     'common/date_time_suggestion.h',
     'common/desktop_notification_messages.h',
     'common/device_orientation/device_motion_hardware_buffer.h',
     'common/device_orientation/device_motion_messages.h',
     'common/device_orientation/device_orientation_hardware_buffer.h',
     'common/device_orientation/device_orientation_messages.h',
@@ skipping 361 matching lines @@
       'link_settings': {
         'libraries': [
           '-landroid',  # ANativeWindow
         ],
       },
      'dependencies': [
         'content.gyp:content_jni_headers',
         'content.gyp:common_aidl',
       ],
     }],
-    ['toolkit_uses_gtk == 1', {
-      'dependencies': [
-        '../build/linux/system.gyp:gtk',
-      ],
-    }],
     ['use_pango == 1', {
       'dependencies': [
         '../build/linux/system.gyp:pangocairo',
       ],
       'sources!': [
         'common/font_list_ozone.cc',
       ],
     }],
     ['use_x11 == 1', {
       'include_dirs': [
@@ skipping 185 matching lines @@
         'common/sandbox_linux/bpf_renderer_policy_linux.cc',
         'common/sandbox_linux/bpf_renderer_policy_linux.h',
         'common/sandbox_linux/sandbox_bpf_base_policy_linux.cc',
         'common/sandbox_linux/sandbox_bpf_base_policy_linux.h',
       ],
     }, {
       'defines': ['USE_SECCOMP_BPF'],
     }],
   ],
 }