Move common app_list delegate code to chrome/browser/ui/app_list.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 49f6b5fd137fe234fed2ac160c1d1c5078bbc15b..a7a326ef6c56e39dfd56712870c37fda3f443b44 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -1657,7 +1657,6 @@
         'browser/task_profiler/task_profiler_data_serializer_unittest.cc',
         'browser/themes/browser_theme_pack_unittest.cc',
         'browser/themes/theme_service_unittest.cc',
-        'browser/ui/ash/app_list/apps_model_builder_unittest.cc',
         'browser/ui/ash/event_rewriter_unittest.cc',
         'browser/ui/ash/ime_controller_chromeos_unittest.cc',
         'browser/ui/ash/launcher/browser_launcher_item_controller_unittest.cc',
@@ -2126,6 +2125,11 @@
             ['exclude', '^browser/sync/glue/chrome_extensions_activity_monitor_unittest.cc'],
           ],
         }],
+        ['use_ash==1', {
+          'sources': [
+            'browser/ui/app_list/apps_model_builder_unittest.cc',
+          ],
+        }],
         ['use_aura==1', {
           'dependencies': [
             '../ui/aura/aura.gyp:test_support_aura',