Delete the GTK+ port of Chrome.

chrome/chrome_renderer.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.
 
 {
   'targets': [
     {
       'target_name': 'renderer',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 399 matching lines @@
           ],
           'dependencies!': [
             '../third_party/hunspell/hunspell.gyp:hunspell',
           ],
         }],
         ['OS=="mac"', {
           'dependencies': [
             '../third_party/mach_override/mach_override.gyp:mach_override',
           ],
         }],
-        ['toolkit_uses_gtk == 1', {
-          'dependencies': [
-            '../build/linux/system.gyp:gtk',
-            '../sandbox/sandbox.gyp:sandbox',
-          ],
-        }],
         ['enable_printing==0', {
           'sources/': [
             ['exclude', '^renderer/printing/']
           ]
         }],
         ['OS=="android"', {
           'sources!': [
             'renderer/prerender/prerender_media_load_deferrer.cc',
             'renderer/prerender/prerender_media_load_deferrer.h',
             'renderer/extensions/api_definitions_natives.cc',
@@ skipping 44 matching lines @@
         }],
         ['enable_printing!=0', {
           'dependencies': [
             '../printing/printing.gyp:printing',
           ],
         }],
       ],
     },
   ],
 }