Make extensions DSE persistent in browser prefs

chrome/browser/search_engines/chrome_template_url_service_client.cc

 // 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.
 
 #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
   // navigates.
   if (history_service_)
     history_service_observer_.Add(history_service_);
 }
 
 ChromeTemplateURLServiceClient::~ChromeTemplateURLServiceClient() {
 }
@@ skipping 50 matching lines @@
   DCHECK_EQ(history_service_, history_service);
   if (!owner_)
     return;
 
   TemplateURLService::URLVisitedDetails visited_details;
   visited_details.url = row.url();
   visited_details.is_keyword_transition =
       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());
+}