Delete the GTK+ port of Chrome.

printing/printing.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,
   },
   'targets': [
     {
@@ skipping 51 matching lines @@
         'print_destination_interface.h',
         'print_destination_none.cc',
         'print_destination_win.cc',
         'print_dialog_gtk_interface.h',
         'print_job_constants.cc',
         'print_job_constants.h',
         'print_settings.cc',
         'print_settings.h',
         'print_settings_initializer.cc',
         'print_settings_initializer.h',
-        'print_settings_initializer_gtk.cc',
-        'print_settings_initializer_gtk.h',
         'print_settings_initializer_mac.cc',
         'print_settings_initializer_mac.h',
         'print_settings_initializer_win.cc',
         'print_settings_initializer_win.h',
         'printed_document.cc',
         'printed_document.h',
         'printed_document_linux.cc',
         'printed_document_mac.cc',
         'printed_document_win.cc',
         'printed_page.cc',
@@ skipping 260 matching lines @@
           },
           'dependencies': [
             '../base/base.gyp:base_java',
           ],
           'includes': [ '../build/java.gypi'  ],
         }
       ]
     }],
   ]
 }