Remove NPAPI from browser and utility

ui/views_content_client/views_content_client_main_parts_mac.mm

Index: ui/views_content_client/views_content_client_main_parts_mac.mm
diff --git a/ui/views_content_client/views_content_client_main_parts_mac.mm b/ui/views_content_client/views_content_client_main_parts_mac.mm
index 3def22c7a9443dc01cfa6cbef0ed57831ea0f8c8..bc0c85ef866806de8c04a51afdeb10bd9443d212 100644
--- a/ui/views_content_client/views_content_client_main_parts_mac.mm
+++ b/ui/views_content_client/views_content_client_main_parts_mac.mm
@@ -54,10 +54,6 @@ ViewsContentClientMainPartsMac::ViewsContentClientMainPartsMac(
   base::FilePath child_process_exe;
   PathService::Get(content::CHILD_PROCESS_EXE, &child_process_exe);
 
-  // Disable plugin discovery since NPAPI plugin support on Mac requires this to
-  // be done in a utility process type which isn't bundled with this executable.
-  content::PluginService::GetInstance()->DisablePluginsDiscoveryForTesting();
-
   app_controller_.reset([[ViewsContentClientAppController alloc] init]);
   [[NSApplication sharedApplication] setDelegate:app_controller_];
 }