[MD settings] include source of policy for content settings

chrome/browser/ui/webui/site_settings_helper.cc

 // 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.
 
 #include "chrome/browser/ui/webui/site_settings_helper.h"
 
 #include <functional>
 #include <string>
 
 #include "base/memory/ptr_util.h"
@@ skipping 255 matching lines @@
     GetPolicyAllowedUrls(type, &policy_exceptions, extension_registry, web_ui,
                          incognito);
   }
 
   for (auto& one_provider_exceptions : all_provider_exceptions) {
     for (auto& exception : one_provider_exceptions)
       exceptions->Append(std::move(exception));
   }
 }
 
+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,
     const extensions::ExtensionRegistry* extension_registry,
     content::WebUI* web_ui,
     bool incognito) {
   DCHECK(type == CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC ||
          type == CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA);
 
   PrefService* prefs = Profile::FromWebUI(web_ui)->GetPrefs();
@@ skipping 152 matching lines @@
     }
   }
 
   for (auto& one_provider_exceptions : all_provider_exceptions) {
     for (auto& exception : one_provider_exceptions)
       exceptions->Append(std::move(exception));
   }
 }
 
 }  // namespace site_settings