[Enhanced Bookmarks] Make enhanced bookmarks default for Android.

components/enhanced_bookmarks/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.
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 }
 
 # GYP: //components/enhanced_bookmarks.gypi:enhanced_bookmarks
 source_set("enhanced_bookmarks") {
   sources = [
     "bookmark_server_cluster_service.cc",
     "bookmark_server_cluster_service.h",
     "bookmark_server_service.cc",
     "bookmark_server_service.h",
-    "enhanced_bookmark_features.cc",
-    "enhanced_bookmark_features.h",
     "enhanced_bookmark_model.cc",
     "enhanced_bookmark_model.h",
     "enhanced_bookmark_model_observer.h",
-    "enhanced_bookmark_switches.cc",
-    "enhanced_bookmark_switches.h",
+    "enhanced_bookmark_switches_ios.cc",
+    "enhanced_bookmark_switches_ios.h",
     "enhanced_bookmark_utils.cc",
     "enhanced_bookmark_utils.h",
     "image_record.cc",
     "image_record.h",
     "image_store.cc",
     "image_store.h",
     "image_store_util.cc",
     "image_store_util.h",
     "image_store_util_ios.mm",
     "item_position.cc",
@@ skipping 70 matching lines @@
   deps = [
     ":test_support",
     "//base",
     "//components/bookmarks/browser",
     "//components/bookmarks/test",
     "//components/enhanced_bookmarks/proto",
     "//sql",
     "//ui/gfx",
   ]
 }