Add --enable-instant-extended-api to about:flags for all platforms

chrome/browser/about_flags.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/about_flags.h"
 
 #include <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
@@ skipping 483 matching lines @@
     kOsMac | kOsWin | kOsLinux,  // Currently does nothing on CrOS.
     SINGLE_VALUE_TYPE(switches::kExperimentalLocationFeatures)
   },
   {
     "tab-groups-context-menu",
     IDS_FLAGS_TAB_GROUPS_CONTEXT_MENU_NAME,
     IDS_FLAGS_TAB_GROUPS_CONTEXT_MENU_DESCRIPTION,
     kOsWin,
     SINGLE_VALUE_TYPE(switches::kEnableTabGroupsContextMenu)
   },
-#if defined(OS_CHROMEOS)
   {
     "enable-instant-extended-api",
     IDS_FLAGS_ENABLE_INSTANT_EXTENDED_API,
     IDS_FLAGS_ENABLE_INSTANT_EXTENDED_API_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableInstantExtendedAPI)
   },
-#endif
   {
     "static-ip-config",
     IDS_FLAGS_STATIC_IP_CONFIG_NAME,
     IDS_FLAGS_STATIC_IP_CONFIG_DESCRIPTION,
     kOsCrOS,
 #if defined(OS_CHROMEOS)
     // This switch exists only on Chrome OS.
     SINGLE_VALUE_TYPE(switches::kEnableStaticIPConfig)
 #else
     SINGLE_VALUE_TYPE("")
@@ skipping 1075 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags