Make extensions DSE persistent in browser prefs

chrome/browser/search_engines/chrome_template_url_service_client.cc

Index: chrome/browser/search_engines/chrome_template_url_service_client.cc
diff --git a/chrome/browser/search_engines/chrome_template_url_service_client.cc b/chrome/browser/search_engines/chrome_template_url_service_client.cc
index 6653ee6c70a236ce8a5e0598ea359bea5e467670..8ca2ccf072c93aef0996d3ef87f7c21f573de5f9 100644
--- a/chrome/browser/search_engines/chrome_template_url_service_client.cc
+++ b/chrome/browser/search_engines/chrome_template_url_service_client.cc
@@ -5,15 +5,18 @@
 #include "chrome/browser/search_engines/chrome_template_url_service_client.h"
 
 #include "base/memory/ptr_util.h"
+#include "chrome/browser/extensions/api/preference/preference_api.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/search_engines/template_url_service.h"
 #include "extensions/common/constants.h"
 
 ChromeTemplateURLServiceClient::ChromeTemplateURLServiceClient(
-    history::HistoryService* history_service)
+    history::HistoryService* history_service,
+    extensions::PreferenceAPI* pref_api)
     : owner_(NULL),
       history_service_observer_(this),
-      history_service_(history_service) {
+      history_service_(history_service),
+      pref_api_(pref_api) {
   // TODO(sky): bug 1166191. The keywords should be moved into the history
   // db, which will mean we no longer need this notification and the history
   // backend can handle automatically adding the search terms as the user
@@ -84,3 +87,14 @@ void ChromeTemplateURLServiceClient::OnURLVisited(
       ui::PageTransitionCoreTypeIs(transition, ui::PAGE_TRANSITION_KEYWORD);
   owner_->OnHistoryURLVisited(visited_details);
 }
+
+void ChromeTemplateURLServiceClient::SetExtensionControlledPref(
+      const std::string extension_id, const std::string pref_name,
+      std::unique_ptr<base::Value> pref_value) {
+  if (!pref_api_)
+    return;
+  pref_api_->SetExtensionControlledPref(extension_id,
+                                        pref_name,
+                                        extensions::kExtensionPrefsScopeRegular,
+                                        pref_value.release());
+}