Remove inside_chromium_build gyp variable

ui/ui.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,
   },
   'includes': [
     'shell_dialogs.gypi',
     'ui_resources.gypi',
+    'ui_unittests.gypi',
   ],
   'targets': [
     {
       'target_name': 'ui',
       'type': '<(component)',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:base_i18n',
         '../base/base.gyp:base_static',
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
@@ skipping 849 matching lines @@
           'sources!': [
             'gfx/render_text.cc',
             'gfx/render_text.h',
           ],
         }],
         ['OS=="linux"', {
           'libraries': [
             '-ldl',
           ],
         }],
-        ['inside_chromium_build==0', {
-          'dependencies': [
-            '<(DEPTH)/webkit/support/setup_third_party.gyp:third_party_headers',
-          ],
-        }],
         ['use_system_icu==1', {
           # When using the system icu, the icu targets generate shim headers
           # which are included by public headers in the ui target, so we need
           # ui to be a hard dependency for all its users.
           'hard_dependency': 1,
         }],
       ],
     },
   ],
   'conditions': [
-    ['inside_chromium_build == 1', {
-      'includes': [
-        'ui_unittests.gypi',
-      ]},
-    ],
     ['OS=="android"' , {
        'targets': [
          {
            'target_name': 'ui_jni_headers',
            'type': 'none',
            'direct_dependent_settings': {
              'include_dirs': [
                '<(SHARED_INTERMEDIATE_DIR)/ui',
              ],
            },
@@ skipping 93 matching lines @@
               'xcode_settings': {
                 'GCC_SYMBOLS_PRIVATE_EXTERN': 'NO',
               },
             }],
           ],
         },
       ],
     }],
   ],
 }