Build app_list_shower only if use_aura=1

build/gn_migration.gypi

 # Copyright (c) 2015 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.
 
 # This file defines five targets that we are using to track the progress of the
 # GYP->GN migration:
 #
 # 'both_gn_and_gyp' lists what GN is currently capable of building and should
 # match the 'both_gn_and_gyp' target in //BUILD.gn.
 #
@@ skipping 134 matching lines @@
             '../ash/ash.gyp:ash_unittests',
           ],
         }],
         ['use_ash==1 or chromeos== 1', {
           'dependencies': [
             '../components/components.gyp:session_manager_component',
           ]
         }],
         ['use_aura==1', {
           'dependencies': [
+            '../ui/app_list/shower/app_list_shower.gyp:app_list_shower_unittests',
             '../ui/aura/aura.gyp:aura_demo',
             '../ui/aura/aura.gyp:aura_unittests',
             '../ui/keyboard/keyboard.gyp:keyboard_unittests',
             '../ui/wm/wm.gyp:wm_unittests',
           ],
         }],
         ['use_ozone==1', {
           'dependencies': [
             '../ui/ozone/ozone.gyp:ozone',
           ],
@@ skipping 169 matching lines @@
             '../ppapi/ppapi_internal.gyp:ppapi_example_video_effects',
             '../ppapi/ppapi_internal.gyp:ppapi_example_video_encode',
             '../ppapi/ppapi_internal.gyp:ppapi_tests',
             '../ppapi/ppapi_internal.gyp:ppapi_perftests',
             '../ppapi/ppapi_internal.gyp:ppapi_unittests',
             '../sync/sync.gyp:run_sync_testserver',
             '../third_party/cacheinvalidation/cacheinvalidation.gyp:cacheinvalidation_unittests',
             '../third_party/libphonenumber/libphonenumber.gyp:libphonenumber_unittests',
             '../tools/imagediff/image_diff.gyp:image_diff',
             '../ui/app_list/app_list.gyp:app_list_unittests',
-            '../ui/app_list/shower/app_list_shower.gyp:app_list_shower_unittests',
             '../ui/compositor/compositor.gyp:compositor_unittests',
           ],
         }],
         ['OS!="android" and chromecast==0', {
           'dependencies': [
             '../chrome/chrome.gyp:browser_tests',
             '../chrome/chrome.gyp:chrome',
             '../chrome/chrome.gyp:interactive_ui_tests',
             '../chrome/chrome.gyp:performance_browser_tests',
             '../chrome/chrome.gyp:sync_integration_tests',
@@ skipping 418 matching lines @@
         }],
         ['OS=="android" and target_arch != "x64"', {
           'dependencies': [
             '../third_party/android_platform/relocation_packer.gyp:android_relocation_packer_unittests#host'
           ],
         }],
       ],
     },
   ]
 }