Remove all uses of toolkit_use_gtk in the gyp files.

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 80 matching lines @@
       'direct_dependent_settings': {
         'include_dirs': [
           '..',
         ],
       },
       'conditions': [
         ['use_aura==1', {
           'dependencies': [
             '<(DEPTH)/ui/aura/aura.gyp:aura',
           ],
-        }], 
-        ['toolkit_uses_gtk == 0',{
-            'sources/': [['exclude', '_cairo\\.cc$']]
-          }, {  # else: toolkit_uses_gtk == 1
-          'dependencies': [
-            # For FT_Init_FreeType and friends.
-            '../build/linux/system.gyp:freetype2',
-            '../build/linux/system.gyp:gtk',
-            '../build/linux/system.gyp:gtkprint',
-          ],
         }],
         # Mac-Aura does not support printing.
         ['OS=="mac" and use_aura==1',{
           'sources!': [
             'printed_document_mac.cc',
             'printing_context_mac.mm',
             'printing_context_mac.h',
           ],
         }],
         ['OS=="mac" and use_aura==0',{
@@ skipping 127 matching lines @@
         'page_range_unittest.cc',
         'page_setup_unittest.cc',
         'pdf_metafile_cg_mac_unittest.cc',
         'printed_page_unittest.cc',
         'printing_context_win_unittest.cc',
         'printing_test.h',
         'printing_utils_unittest.cc',
         'units_unittest.cc',
       ],
       'conditions': [
-        ['toolkit_uses_gtk == 0', {'sources/': [['exclude', '_gtk_unittest\\.cc$']]}],
         ['OS!="mac"', {'sources/': [['exclude', '_mac_unittest\\.(cc|mm?)$']]}],
         ['OS!="win"', {'sources/': [['exclude', '_win_unittest\\.cc$']]}],
         ['use_cups==1', {
           'defines': [
             'USE_CUPS',
           ],
           'sources': [
             'backend/cups_helper_unittest.cc',
           ],
         }],
-        ['toolkit_uses_gtk == 1', {
-          'dependencies': [
-            '../build/linux/system.gyp:gtk',
-          ],
-        }],
         [ 'os_posix == 1 and OS != "mac" and OS != "android" and OS != "ios"', {
           'conditions': [
             # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
             ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
             }],
           ],
         }],
@@ skipping 58 matching lines @@
           },
           'dependencies': [
             '../base/base.gyp:base_java',
           ],
           'includes': [ '../build/java.gypi'  ],
         }
       ]
     }],
   ]
 }