Make extensions DSE persistent in browser prefs

chrome/browser/search_engines/template_url_service_factory.cc

Index: chrome/browser/search_engines/template_url_service_factory.cc
diff --git a/chrome/browser/search_engines/template_url_service_factory.cc b/chrome/browser/search_engines/template_url_service_factory.cc
index 464441bce1f5adef08af56033d8ee276be2ceedc..85fd605b074b7b75a69359776dcc126ccd6fe1e6 100644
--- a/chrome/browser/search_engines/template_url_service_factory.cc
+++ b/chrome/browser/search_engines/template_url_service_factory.cc
@@ -10,6 +10,7 @@
 #include "base/memory/ptr_util.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/extensions/api/preference/preference_api.h"
 #include "chrome/browser/google/google_url_tracker_factory.h"
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
@@ -57,7 +58,8 @@ std::unique_ptr<KeyedService> TemplateURLServiceFactory::BuildInstanceFor(
       std::unique_ptr<TemplateURLServiceClient>(
           new ChromeTemplateURLServiceClient(
               HistoryServiceFactory::GetForProfile(
-                  profile, ServiceAccessType::EXPLICIT_ACCESS))),
+                  profile, ServiceAccessType::EXPLICIT_ACCESS),
+              extensions::PreferenceAPI::Get(profile))),
       GoogleURLTrackerFactory::GetForProfile(profile),
       g_browser_process->rappor_service(), dsp_change_callback);
 }