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

chrome/default_plugin/plugin_impl_gtk.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/default_plugin/plugin_impl_gtk.h"
 
 #include <X11/Xdefs.h>
 #include <gtk/gtk.h>
 
 #include "base/file_util.h"
@@ skipping 31 matching lines @@
 
   if (mime_type == NULL || strlen(mime_type) == 0) {
     DLOG(WARNING) << __FUNCTION__ << " Invalid parameters passed in";
     NOTREACHED();
     return false;
   }
 
   instance_ = instance;
   mime_type_ = mime_type;
 
-  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) {
   if (container_)
     gtk_widget_destroy(container_);
   container_ = gtk_plug_new(reinterpret_cast<XID>(window_info->window));
 
   // Add label.
   GtkWidget* box = gtk_vbox_new(FALSE, 0);
   GtkWidget* label = gtk_label_new("Missing Plug-in");
@@ skipping 74 matching lines @@
 }
 
 void PluginInstallerImpl::NotifyPluginStatus(int status) {
   ChildThread::current()->Send(
       new ChromePluginProcessHostMsg_MissingPluginStatus(
           status,
           renderer_process_id(),
           render_view_id(),
           0));
 }