Allow building search_engines component with configuration_policy==0

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",
     "default_search_manager.h",
-    "default_search_policy_handler.cc",
-    "default_search_policy_handler.h",
     "keyword_table.cc",
     "keyword_table.h",
     "keyword_web_data_service.cc",
     "keyword_web_data_service.h",
     "search_engine_type.h",
     "search_engines_pref_names.cc",
     "search_engines_pref_names.h",
     "search_engines_switches.cc",
     "search_engines_switches.h",
     "search_host_to_urls_map.cc",
@@ skipping 17 matching lines @@
     "template_url_service_observer.h",
     "util.cc",
     "util.h",
   ]
 
   deps = [
     ":prepopulated_engines",
     "//base",
     "//components/keyed_service/core",
     "//components/metrics/proto",
-    "//components/policy",
     "//components/pref_registry",
     "//components/rappor",
     "//components/strings",
     "//components/url_fixer",
     "//components/webdata/common",
     "//google_apis",
     "//net",
     "//sql",
     "//sync",
     "//third_party/libxml",
     "//ui/gfx",
     "//url",
     #'google_core_browser',  TODO(GYP)
   ]
+
+  if (enable_configuration_policy) {
+    sources += [
+      "default_search_policy_handler.cc",
+      "default_search_policy_handler.h",
+    ]
+    deps += [
+      "//components/policy",
+    ]
+  }
 }
 
 json_to_struct("prepopulated_engines") {
   visibility = ":*"
 
   source = "prepopulated_engines.json"
   schema_file = "prepopulated_engines_schema.json"
   namespace = "TemplateURLPrepopulateData"
 }