x11: Split the gfx_x11 target into its own gyp file.

chrome/chrome_tests.gypi

 # Copyright 2013 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.
 {
   'includes': [
     'js_unittest_vars.gypi',
   ],
   'targets': [
     {
       'target_name': 'interactive_ui_tests',
@@ skipping 629 matching lines @@
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '<(SHARED_INTERMEDIATE_DIR)',
         ],
       },
       'conditions': [
         ['use_x11==1', {
           'dependencies': [
             '../build/linux/system.gyp:x11',
-            '../ui/gfx/gfx.gyp:gfx_x11',
+            '../ui/gfx/x/gfx_x11.gyp:gfx_x11',
           ]
         }]
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
     {
       'target_name': 'chromedriver',
       'type': 'executable',
       'dependencies': [
@@ skipping 2290 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }