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

ui/ui_unittests.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': [
     {
       'target_name': 'ui_test_support',
       'dependencies': [
         '../base/base.gyp:base',
         '../skia/skia.gyp:skia',
         '../testing/gtest.gyp:gtest',
         'events/events.gyp:events',
         'gfx/gfx.gyp:gfx',
       ],
@@ skipping 41 matching lines @@
           ],
         }],
       ],
     },
     {
       'target_name': 'run_ui_unittests',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:test_support_base',
-        'ui',
+        'ui.gyp:ui',
       ],
       'sources': [
         'test/test_suite.cc',
         'test/test_suite.h',
         'test/run_all_unittests.cc',
       ],
     },
     {
       'target_name': 'ui_unittests',
       'type': '<(gtest_target_type)',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:test_support_base',
         '../skia/skia.gyp:skia',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         '../third_party/icu/icu.gyp:icui18n',
         '../third_party/icu/icu.gyp:icuuc',
         '../third_party/libpng/libpng.gyp:libpng',
         '../url/url.gyp:url_lib',
         'base/strings/ui_strings.gyp:ui_strings',
         'events/events.gyp:events',
-        'keycode_converter',
         'run_ui_unittests',
-        'shell_dialogs',
-        'ui',
-        'ui_resources',
+        'shell_dialogs/shell_dialogs.gyp:shell_dialogs',
+        'ui.gyp:keycode_converter',
+        'ui.gyp:ui',
+        'ui.gyp:ui_resources',
         'ui_test_support',
       ],
       # iOS uses a small subset of ui. common_sources are the only files that
       # are built on iOS.
       'common_sources' : [
         'base/layout_unittest.cc',
         'base/l10n/l10n_util_mac_unittest.mm',
         'base/l10n/l10n_util_unittest.cc',
         'base/l10n/l10n_util_win_unittest.cc',
         'base/l10n/time_format_unittest.cc',
@@ skipping 268 matching lines @@
           'variables': {
             'test_suite_name': 'ui_unittests',
             'input_shlib_path': '<(SHARED_LIB_DIR)/<(SHARED_LIB_PREFIX)ui_unittests<(SHARED_LIB_SUFFIX)',
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }