Prepare for building with enable_app_list=0 on Desktop

ui/app_list/app_list_switches.h

Index: ui/app_list/app_list_switches.h
diff --git a/ui/app_list/app_list_switches.h b/ui/app_list/app_list_switches.h
index ccd62fd17421ab7a5cfd2db8a14d0e4d21da5af4..21955d506c93490c1405bdadf4cd8ac33d569e66 100644
--- a/ui/app_list/app_list_switches.h
+++ b/ui/app_list/app_list_switches.h
@@ -26,10 +26,6 @@ APP_LIST_EXPORT extern const char kEnableDriveSearchInChromeLauncher[];
 APP_LIST_EXPORT extern const char kDisableDriveSearchInChromeLauncher[];
 APP_LIST_EXPORT extern const char kResetAppListInstallState[];
 
-#if defined(OS_MACOSX)
-APP_LIST_EXPORT extern const char kEnableMacViewsAppList[];
-#endif
-
 bool APP_LIST_EXPORT IsAppListSyncEnabled();
 
 bool APP_LIST_EXPORT IsFolderUIEnabled();
@@ -51,10 +47,6 @@ bool APP_LIST_EXPORT IsDriveAppsInAppListEnabled();
 
 bool APP_LIST_EXPORT IsDriveSearchInChromeLauncherEnabled();
 
-#if defined(OS_MACOSX)
-bool APP_LIST_EXPORT IsMacViewsAppListEnabled();
-#endif
-
 }  // namespace switches
 }  // namespace app_list