Change the "Disable outdated plug-ins" lab to block them instead.

chrome/browser/renderer_host/render_view_host_delegate.h

 // 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.
 
 #ifndef CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 265 matching lines @@
     // Notification from the renderer that a plugin instance has crashed.
     //
     // BrowserIntegration isn't necessarily the best place for this, if you
     // need to implement this function somewhere that doesn't need any other
     // BrowserIntegration callbacks, feel free to move it elsewhere.
     virtual void OnCrashedPlugin(const FilePath& plugin_path) = 0;
 
     // Notification that a worker process has crashed.
     virtual void OnCrashedWorker() = 0;
 
-    virtual void OnDisabledOutdatedPlugin(const string16& name,
-                                          const GURL& update_url) = 0;
+    virtual void OnBlockedOutdatedPlugin(const string16& name,
+                                         const GURL& update_url) = 0;
 
     // Notification that a user's request to install an application has
     // completed.
     virtual void OnDidGetApplicationInfo(
         int32 page_id,
         const WebApplicationInfo& app_info) = 0;
 
     // Notification when an application programmatically requests installation.
     virtual void OnInstallApplication(
         const WebApplicationInfo& app_info) = 0;
@@ skipping 578 matching lines @@
                                 bool remember) {}
 
   // Update the content restrictions, i.e. disable print/copy.
   virtual void UpdateContentRestrictions(int restrictions) {}
 
  protected:
   virtual ~RenderViewHostDelegate() {}
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_