Show a replacement plug-in for loading errors.

chrome/renderer/plugins/plugin_placeholder.h

Index: chrome/renderer/plugins/plugin_placeholder.h
diff --git a/chrome/renderer/plugins/plugin_placeholder.h b/chrome/renderer/plugins/plugin_placeholder.h
index eb70d35705cc4f9cad64e8fdfc5f7ed6cb1a1e9e..6275284bae9d00319cbaf2e700ea2ad8fe64a898 100644
--- a/chrome/renderer/plugins/plugin_placeholder.h
+++ b/chrome/renderer/plugins/plugin_placeholder.h
@@ -16,10 +16,10 @@
 struct ChromeViewHostMsg_GetPluginInfo_Status;
 
 namespace webkit {
-struct WebPluginInfo;
 namespace npapi {
 class PluginGroup;
 }
+struct WebPluginInfo;
 }
 
 // Placeholders can be used if a plug-in is missing or not available
@@ -35,6 +35,10 @@ class PluginPlaceholder : public content::RenderViewObserver,
       WebKit::WebFrame* frame,
       const WebKit::WebPluginParams& params);
 
+  static PluginPlaceholder* CreateErrorPlugin(
+      content::RenderView* render_view,
+      const FilePath& plugin_path);
+
   static PluginPlaceholder* CreateBlockedPlugin(
       content::RenderView* render_view,
       WebKit::WebFrame* frame,