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

ui/app_list/app_list.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 152 matching lines @@
       'target_name': 'app_list_unittests',
       'type': 'executable',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:test_support_base',
         # TODO: Remove this dependency. See comment for views_unittests.
         '../../chrome/chrome_resources.gyp:packed_resources',
         '../../skia/skia.gyp:skia',
         '../../testing/gtest.gyp:gtest',
         '../compositor/compositor.gyp:compositor',
-        '../ui.gyp:run_ui_unittests',
         '../ui.gyp:ui',
         '../ui.gyp:ui_resources',
-        '../ui.gyp:ui_test_support',
+        '../ui_unittests.gyp:run_ui_unittests',
+        '../ui_unittests.gyp:ui_test_support',
         'app_list',
       ],
       'sources': [
         'app_list_model_unittest.cc',
         'pagination_model_unittest.cc',
         'test/app_list_test_model.cc',
         'test/app_list_test_model.h',
         'test/app_list_test_view_delegate.cc',
         'test/app_list_test_view_delegate.h',
         'cocoa/app_list_view_controller_unittest.mm',
@@ skipping 16 matching lines @@
             '../../content/content.gyp:content',
             '../../content/content.gyp:content_browser',
           ],
         }, {  # toolkit_views==0
           'sources/': [
             ['exclude', 'views/'],
           ]
         }],
         ['OS=="mac"', {
           'dependencies': [
-            '../ui.gyp:ui_test_support',
+            '../ui_unittests.gyp:ui_test_support',
           ],
           'conditions': [
             ['component=="static_library"', {
               # Needed to link to Obj-C static libraries.
               'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-ObjC']},
             }],
           ],
         }, {  # OS!="mac"
           'sources/': [
             ['exclude', 'cocoa/'],
@@ skipping 14 matching lines @@
             '../../webkit/glue/webkit_glue.gyp:glue',
             '../../webkit/glue/webkit_glue.gyp:glue_child',
           ],
         }],
       ],
       # Disable c4267 warnings until we fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ],
 }