Remove enable_configuration_policy build define.

components/search_engines/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.
 
 import("//build/config/features.gni")
 import("//tools/json_to_struct/json_to_struct.gni")
 
 static_library("search_engines") {
   sources = [
     "default_search_manager.cc",
@@ skipping 65 matching lines @@
     "//google_apis",
     "//net",
     "//sql",
     "//third_party/libxml",
     "//ui/base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//url",
   ]
 
-  if (enable_configuration_policy) {
+  if (!is_ios) {
     sources += [
       "default_search_policy_handler.cc",
       "default_search_policy_handler.h",
     ]
     deps += [
       "//components/policy:generated",
       "//components/policy/core/browser",
     ]
   }
 }
@@ skipping 36 matching lines @@
     "//components/sync:test_support_driver",
     "//components/sync:test_support_model",
     "//components/sync_preferences:test_support",
     "//components/webdata/common",
     "//sql",
     "//testing/gmock",
     "//testing/gtest",
     "//url",
   ]
 
-  if (enable_configuration_policy) {
+  if (!is_ios) {
     sources += [ "default_search_policy_handler_unittest.cc" ]
 
     deps += [
       "//components/policy:generated",
       "//components/policy/core/browser:test_support",
     ]
   }
 }
 
 json_to_struct("prepopulated_engines") {
   visibility = [ ":*" ]
 
   source = "prepopulated_engines.json"
   schema_file = "prepopulated_engines_schema.json"
   namespace = "TemplateURLPrepopulateData"
 }