[MD settings] include source of policy for content settings

chrome/browser/ui/webui/site_settings_helper.cc

Index: chrome/browser/ui/webui/site_settings_helper.cc
diff --git a/chrome/browser/ui/webui/site_settings_helper.cc b/chrome/browser/ui/webui/site_settings_helper.cc
index c1a6654f5e8a43586aae4f77a653086266cb448f..ef0a5fedc8f58568ca53a79cd1e53c0ad4b9ee87 100644
--- a/chrome/browser/ui/webui/site_settings_helper.cc
+++ b/chrome/browser/ui/webui/site_settings_helper.cc
@@ -273,6 +273,20 @@ void GetExceptionsFromHostContentSettingsMap(
   }
 }
 
+void GetContentCategorySetting(
+    const HostContentSettingsMap* map,
+    ContentSettingsType content_type,
+    base::DictionaryValue* object) {
+  std::string provider;
+  std::string setting = content_settings::ContentSettingToString(
+      map->GetDefaultContentSetting(content_type, &provider));
+  DCHECK(!setting.empty());
+
+  object->SetString(site_settings::kSetting, setting);
+  if (provider != "default")
+    object->SetString(site_settings::kSource, provider);
+}
+
 void GetPolicyAllowedUrls(
     ContentSettingsType type,
     std::vector<std::unique_ptr<base::DictionaryValue>>* exceptions,