Show a replacement plug-in for loading errors.

chrome/renderer/chrome_content_renderer_client.h

Index: chrome/renderer/chrome_content_renderer_client.h
diff --git a/chrome/renderer/chrome_content_renderer_client.h b/chrome/renderer/chrome_content_renderer_client.h
index c18d8664ebeeebf861e5dd675be74f01b8e1d062..c587e7095451d19624e32f51bed917d7358dde9a 100644
--- a/chrome/renderer/chrome_content_renderer_client.h
+++ b/chrome/renderer/chrome_content_renderer_client.h
@@ -58,6 +58,9 @@ class ChromeContentRendererClient : public content::ContentRendererClient {
       WebKit::WebFrame* frame,
       const WebKit::WebPluginParams& params,
       WebKit::WebPlugin** plugin) OVERRIDE;
+  virtual WebKit::WebPlugin* CreatePluginReplacement(
+      content::RenderView* render_view,
+      const FilePath& plugin_path) OVERRIDE;
   virtual bool HasErrorPage(int http_status_code,
                             std::string* error_domain) OVERRIDE;
   virtual void GetNavigationErrorStrings(