Show missing plug-in infobar only if a plug-in is available.

chrome/default_plugin/plugin_impl_aura.cc

Index: chrome/default_plugin/plugin_impl_aura.cc
diff --git a/chrome/default_plugin/plugin_impl_aura.cc b/chrome/default_plugin/plugin_impl_aura.cc
index cdf8ffbe59f9ba174dbdd264939458f107d4478e..4122854f6887986b1c6eb5788e91cd91ffc55fe2 100644
--- a/chrome/default_plugin/plugin_impl_aura.cc
+++ b/chrome/default_plugin/plugin_impl_aura.cc
@@ -36,8 +36,8 @@ bool PluginInstallerImpl::Initialize(void* module_handle,
     return false;
   }
 
-  return PluginInstallerBase::Initialize(module_handle, instance, mime_type,
-                                         argc, argn, argv);
+  PluginInstallerBase::SetRoutingIds(argc, argn, argv);
+  return true;
 }
 
 bool PluginInstallerImpl::NPP_SetWindow(NPWindow* window_info) {