Allow building search_engines component with configuration_policy==0

components/search_engines/BUILD.gn

Index: components/search_engines/BUILD.gn
diff --git a/components/search_engines/BUILD.gn b/components/search_engines/BUILD.gn
index 734ec72b41b36c705ce044b08c4fdb9765d60588..e8cd405d8fa3a84c7f7d57657f83c46062b9e844 100644
--- a/components/search_engines/BUILD.gn
+++ b/components/search_engines/BUILD.gn
@@ -2,14 +2,13 @@
 # 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",
@@ -47,7 +46,6 @@ static_library("search_engines") {
     "//base",
     "//components/keyed_service/core",
     "//components/metrics/proto",
-    "//components/policy",
     "//components/pref_registry",
     "//components/rappor",
     "//components/strings",
@@ -62,6 +60,16 @@ static_library("search_engines") {
     "//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") {