Remove the unused helper apps on OS X.

content/browser/plugin_process_host.cc

Index: content/browser/plugin_process_host.cc
diff --git a/content/browser/plugin_process_host.cc b/content/browser/plugin_process_host.cc
index 61deb7766d9ae1c61446791f9b749c358785933f..a86c7e213183c811d9958e898dbc63f8e86096ac 100644
--- a/content/browser/plugin_process_host.cc
+++ b/content/browser/plugin_process_host.cc
@@ -189,12 +189,7 @@ bool PluginProcessHost::Init(const WebPluginInfo& info) {
   base::CommandLine::StringType plugin_launcher =
       browser_command_line.GetSwitchValueNative(switches::kPluginLauncher);
 
-#if defined(OS_MACOSX)
-  // Run the plugin process in a mode tolerant of heap execution without
-  // explicit mprotect calls. Some plugins still rely on this quaint and
-  // archaic "feature." See http://crbug.com/93551.
-  int flags = ChildProcessHost::CHILD_ALLOW_HEAP_EXECUTION;
-#elif defined(OS_LINUX)
+#if defined(OS_LINUX)
   int flags = plugin_launcher.empty() ? ChildProcessHost::CHILD_ALLOW_SELF :
                                         ChildProcessHost::CHILD_NORMAL;
 #else