[MD settings] include source of policy for content settings

chrome/browser/ui/webui/site_settings_helper.h

 // Copyright 2016 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_SITE_SETTINGS_HELPER_H_
 #define CHROME_BROWSER_UI_WEBUI_SITE_SETTINGS_HELPER_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 70 matching lines @@
 // will be returned.
 void GetExceptionsFromHostContentSettingsMap(
     const HostContentSettingsMap* map,
     ContentSettingsType type,
     const extensions::ExtensionRegistry* extension_registry,
     content::WebUI* web_ui,
     bool incognito,
     const std::string* filter,
     base::ListValue* exceptions);
 
+// Fills in object saying what the current settings is for the category (such as
+// enabled or blocked) and the source of that setting (such preference, policy,
+// or extension).
+void GetContentCategorySetting(
+    const HostContentSettingsMap* map,
+    ContentSettingsType content_type,
+    base::DictionaryValue* object);
+
 // Returns exceptions constructed from the policy-set allowed URLs
 // for the content settings |type| mic or camera.
 void GetPolicyAllowedUrls(
     ContentSettingsType type,
     std::vector<std::unique_ptr<base::DictionaryValue>>* exceptions,
     const extensions::ExtensionRegistry* extension_registry,
     content::WebUI* web_ui,
     bool incognito);
 
 // This struct facilitates lookup of a chooser context factory function by name
@@ skipping 23 matching lines @@
 // Fills in |exceptions| with Values for the given |chooser_type| from map.
 void GetChooserExceptionsFromProfile(
     Profile* profile,
     bool incognito,
     const ChooserTypeNameEntry& chooser_type,
     base::ListValue* exceptions);
 
 }  // namespace site_settings
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SITE_SETTINGS_HELPER_H_