Fix some TODO(GYP) in the GN build.

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 213 matching lines @@
   ]
 
   deps = [
     ":app_list",
     "//base",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 }
 
-if (is_linux && !is_chromeos) {
-  # TODO(GYP): Figure out which of these work and are needed on other platforms.
-  if (toolkit_views) {
-    executable("app_list_demo") {
-      testonly = true
+if (toolkit_views) {
+  executable("app_list_demo") {
+    testonly = true
 
-      sources = [
-        "demo/app_list_demo_views.cc",
+    sources = [
+      "demo/app_list_demo_views.cc",
+    ]
+
+    deps = [
+      ":app_list",
+      ":test_support",
+      "//base",
+      "//build/config/sanitizers:deps",
+      "//content",
+      "//content/public/browser",
+      "//skia",
+      "//ui/base",
+      "//ui/events",
+      "//ui/resources",
+      "//ui/resources:ui_test_pak",
+      "//ui/views",
+      "//ui/views/controls/webview",
+      "//ui/views_content_client",
+      "//url",
+    ]
+    if (is_win) {
+      configs -= [ "//build/config/win:console" ]
+      configs += [ "//build/config/win:windowed" ]
+
+      deps += [
+        "//content:sandbox_helper_win",
+        "//sandbox",
       ]
-
-      deps = [
-        ":app_list",
-        ":test_support",
-        "//base",
-        "//build/config/sanitizers:deps",
-        "//content",
-        "//content/public/browser",
-        "//skia",
-        "//ui/base",
-        "//ui/events",
-        "//ui/resources",
-        "//ui/resources:ui_test_pak",
-        "//ui/views",
-        "//ui/views/controls/webview",
-        "//ui/views_content_client",
-        "//url",
-      ]
-      if (is_win) {
-        configs -= [ "//build/config/win:console" ]
-        configs += [ "//build/config/win:windowed" ]
-
-        deps += [
-          "//content:sandbox_helper_win",
-          "//sandbox",
-        ]
-      }
     }
   }
 }
 
 test("app_list_unittests") {
   sources = [
     "app_list_item_list_unittest.cc",
     "app_list_model_unittest.cc",
     "folder_image_unittest.cc",
     "pagination_model_unittest.cc",
@@ skipping 53 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",
     ]
   }
 }