Revert "Enable checks for outdated plugins even when third-party plugin installation is not enabled"

chrome/browser/plugins/plugin_info_message_filter.cc

Index: chrome/browser/plugins/plugin_info_message_filter.cc
diff --git a/chrome/browser/plugins/plugin_info_message_filter.cc b/chrome/browser/plugins/plugin_info_message_filter.cc
index 9298723e258f3e60f2f72d99b474273728282c6a..8e4a119b4ee2844486a4065905eeb633473acb35 100644
--- a/chrome/browser/plugins/plugin_info_message_filter.cc
+++ b/chrome/browser/plugins/plugin_info_message_filter.cc
@@ -388,6 +388,7 @@
 
   PluginMetadata::SecurityStatus plugin_status =
       plugin_metadata->GetSecurityStatus(plugin);
+#if defined(ENABLE_PLUGIN_INSTALLATION)
   // Check if the plugin is outdated.
   if (plugin_status == PluginMetadata::SECURITY_STATUS_OUT_OF_DATE &&
       !allow_outdated_plugins_.GetValue()) {
@@ -398,7 +399,7 @@
     }
     return;
   }
-
+#endif
   // Check if the plugin or its group is enabled by policy.
   PluginPrefs::PolicyStatus plugin_policy =
       plugin_prefs_->PolicyStatusForPlugin(plugin.name);