ui: Have shell_dialogs into its own gyp file under its shell_dialogs/ directory.

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 307 matching lines @@
             ['include', '^base/l10n/l10n_util_mac\\.mm$'],
           ],
         }],
       ],
       'conditions': [
         ['OS!="ios"', {
           'includes': [
             'base/ime/ime.gypi',
           ],
         }, {  # OS=="ios"
           # iOS only uses a subset of UI.

[lliabraa, 2013/10/30 15:39:33]

maybe add the dependency on ui_unittests.gyp here?

           'sources/': [
             ['exclude', '\\.(cc|mm)$'],
             ['include', '_ios\\.(cc|mm)$'],
             ['include', '(^|/)ios/'],
             ['include', '^base/l10n/'],
             ['include', '^base/layout'],
             ['include', '^base/resource/'],
             ['include', '^base/ui_base_'],
           ],
           'link_settings': {
@@ skipping 374 matching lines @@
               'xcode_settings': {
                 'GCC_SYMBOLS_PRIVATE_EXTERN': 'NO',
               },
             }],
           ],
         },
       ],
     }],
   ],
 }