Adding --disable-plugins-discovery command line switch to not load third-party plugins from common …

chrome/browser/browser_process_impl.cc

Index: chrome/browser/browser_process_impl.cc
===================================================================
--- chrome/browser/browser_process_impl.cc	(revision 205261)
+++ chrome/browser/browser_process_impl.cc	(working copy)
@@ -873,9 +873,12 @@
 #if defined(OS_POSIX)
   // Also find plugins in a user-specific plugins dir,
   // e.g. ~/.config/chromium/Plugins.
-  base::FilePath user_data_dir;
-  if (PathService::Get(chrome::DIR_USER_DATA, &user_data_dir))
-    plugin_service->AddExtraPluginDir(user_data_dir.Append("Plugins"));
+  const CommandLine& cmd_line = *CommandLine::ForCurrentProcess();
+  if (!cmd_line.HasSwitch(switches::kDisablePluginsDiscovery)) {
+    base::FilePath user_data_dir;
+    if (PathService::Get(chrome::DIR_USER_DATA, &user_data_dir))
+      plugin_service->AddExtraPluginDir(user_data_dir.Append("Plugins"));
+  }
 #endif
 
   // Triggers initialization of the singleton instance on UI thread.