Ensure we don't load plugins on the IO thread

chrome/browser/renderer_host/resource_dispatcher_host.h

Index: chrome/browser/renderer_host/resource_dispatcher_host.h
===================================================================
--- chrome/browser/renderer_host/resource_dispatcher_host.h	(revision 23449)
+++ chrome/browser/renderer_host/resource_dispatcher_host.h	(working copy)
@@ -108,6 +108,7 @@
           has_started_reading(false),
           paused_read_bytes(0) {
     }
+    virtual ~ExtraRequestInfo() { resource_handler->OnRequestClosed(); }
 
     // Top-level ResourceHandler servicing this request.
     scoped_refptr<ResourceHandler> resource_handler;
@@ -352,11 +353,6 @@
   // Retrieves a URLRequest.  Must be called from the IO thread.
   URLRequest* GetURLRequest(GlobalRequestID request_id) const;
 
-  // A test to determining whether a given request should be forwarded to the
-  // download thread.
-  bool ShouldDownload(const std::string& mime_type,
-                      const std::string& content_disposition);
-
   // Notifies our observers that a request has been cancelled.
   void NotifyResponseCompleted(URLRequest* request, int process_id);
 
@@ -551,8 +547,6 @@
   // List of objects observing resource dispatching.
   ObserverList<Observer> observer_list_;
 
-  PluginService* plugin_service_;
-
   // For running tasks.
   ScopedRunnableMethodFactory<ResourceDispatcherHost> method_runner_;