[MD settings] show controlledBy icon for HostApp and platform_app exceptions

chrome/browser/resources/settings/site_settings/site_settings_behavior.js

Index: chrome/browser/resources/settings/site_settings/site_settings_behavior.js
diff --git a/chrome/browser/resources/settings/site_settings/site_settings_behavior.js b/chrome/browser/resources/settings/site_settings/site_settings_behavior.js
index 5a33742a41383f8ecb8cd5f3c9a63e58f5e841a8..318bbd5f2d69a065d3562140780fd403881ddcd7 100644
--- a/chrome/browser/resources/settings/site_settings/site_settings_behavior.js
+++ b/chrome/browser/resources/settings/site_settings/site_settings_behavior.js
@@ -168,8 +168,10 @@ var SiteSettingsBehaviorImpl = {
     }
 
     var enforcement = '';
-    if (exception.source == 'policy' || exception.source == 'extension')
+    if (exception.source == 'extension' || exception.source == 'HostedApp' ||
+        exception.source == 'platform_app' || exception.source == 'policy') {
       enforcement = chrome.settingsPrivate.Enforcement.ENFORCED;
+    }
 
     var controlledBy = kControlledByLookup[exception.source] || '';