Don't load plugins on prerendered pages until the pages are displayed....

chrome/renderer/render_view.h

 // Copyright (c) 2011 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_RENDERER_RENDER_VIEW_H_
 #define CHROME_RENDERER_RENDER_VIEW_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 861 matching lines @@
   void OnGetAllSavableResourceLinksForCurrentPage(const GURL& page_url);
   void OnGetApplicationInfo(int page_id);
   void OnGetSerializedHtmlDataForCurrentPageWithLocalLinks(
       const std::vector<GURL>& links,
       const std::vector<FilePath>& local_paths,
       const FilePath& local_directory_name);
   void OnHandleMessageFromExternalHost(const std::string& message,
                                        const std::string& origin,
                                        const std::string& target);
   void OnInstallMissingPlugin();
+  void OnDisplayPrerenderedPage();
   void OnMediaPlayerActionAt(const gfx::Point& location,
                              const WebKit::WebMediaPlayerAction& action);
   void OnMoveOrResizeStarted();
   void OnNavigate(const ViewMsg_Navigate_Params& params);
   void OnNotifyRendererViewType(ViewType::Type view_type);
   void OnPaste();
 #if defined(OS_MACOSX)
   void OnPluginImeCompositionConfirmed(const string16& text, int plugin_id);
 #endif
   void OnPrintingDone(int document_cookie, bool success);
@@ skipping 91 matching lines @@
       WebKit::WebFrame* frame,
       const WebKit::WebPluginParams& params,
       const FilePath& path,
       webkit::ppapi::PluginModule* pepper_module);
 
   WebKit::WebPlugin* CreatePluginPlaceholder(
       WebKit::WebFrame* frame,
       const WebKit::WebPluginParams& params,
       const webkit::npapi::PluginGroup& group,
       int resource_id,
-      int message_id);
+      int message_id,
+      bool is_blocked_for_prerendering);
 
   // Sends an IPC notification that the specified content type was blocked.
   // If the content type requires it, |resource_identifier| names the specific
   // resource that was blocked (the plugin path in the case of plugins),
   // otherwise it's the empty string.
   void DidBlockContentType(ContentSettingsType settings_type,
                            const std::string& resource_identifier);
 
   // This callback is triggered when DownloadImage completes, either
   // succesfully or with a failure. See DownloadImage for more details.
@@ skipping 460 matching lines @@
   // bunch of stuff, you should probably create a helper class and put your
   // data and methods on that to avoid bloating RenderView more.  You can use
   // the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderView);
 };
 
 #endif  // CHROME_RENDERER_RENDER_VIEW_H_