Move gn _run target generation into test().

ui/app_list/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 component("app_list") {
   sources = [
     "app_list_constants.cc",
@@ skipping 249 matching lines @@
 
         deps += [
           "//content:sandbox_helper_win",
           "//sandbox",
         ]
       }
     }
   }
 }
 
-# TODO(GYP): Delete this after we've converted everything to GN.
-# The _run targets exist only for compatibility w/ GYP.
-group("app_list_unittests_run") {
-  testonly = true
-  deps = [
-    ":app_list_unittests",
-  ]
-}
-
 test("app_list_unittests") {
   sources = [
     "app_list_item_list_unittest.cc",
     "app_list_model_unittest.cc",
     "folder_image_unittest.cc",
     "pagination_model_unittest.cc",
     "search/history_data_store_unittest.cc",
     "search/mixer_unittest.cc",
     "search/term_break_iterator_unittest.cc",
     "search/tokenized_string_char_iterator_unittest.cc",
@@ skipping 54 matching lines @@
       "cocoa/app_list_view_controller_unittest.mm",
       "cocoa/app_list_window_controller_unittest.mm",
       "cocoa/apps_grid_controller_unittest.mm",
       "cocoa/apps_search_box_controller_unittest.mm",
       "cocoa/apps_search_results_controller_unittest.mm",
       "cocoa/test/apps_grid_controller_test_helper.h",
       "cocoa/test/apps_grid_controller_test_helper.mm",
     ]
   }
 }