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..6446d0a2f650c148c38615c7f47368b4b7c2b361 100644
--- a/chrome/browser/search_engines/template_url_service_factory.cc
+++ b/chrome/browser/search_engines/template_url_service_factory.cc
@@ -23,6 +23,7 @@
 #include "components/search_engines/default_search_manager.h"
 #include "components/search_engines/search_engines_pref_names.h"
 #include "components/search_engines/template_url_service.h"
+#include "extensions/browser/extension_pref_value_map_factory.h"
 
 #if defined(ENABLE_RLZ)
 #include "components/rlz/rlz_tracker.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),
+              ExtensionPrefValueMapFactory::GetForBrowserContext(context))),
       GoogleURLTrackerFactory::GetForProfile(profile),
       g_browser_process->rappor_service(), dsp_change_callback);
 }