Show a replacement plug-in for loading errors.

webkit/plugins/npapi/webplugin_page_delegate.h

Index: webkit/plugins/npapi/webplugin_page_delegate.h
diff --git a/webkit/plugins/npapi/webplugin_page_delegate.h b/webkit/plugins/npapi/webplugin_page_delegate.h
index 3176ccd9e7e5a379f230b3708d8745faeea3a72a..8b87ce2c9ff440cd2e5e81d641e4d47480062c67 100644
--- a/webkit/plugins/npapi/webplugin_page_delegate.h
+++ b/webkit/plugins/npapi/webplugin_page_delegate.h
@@ -13,6 +13,7 @@ class FilePath;
 
 namespace WebKit {
 class WebCookieJar;
+class WebPlugin;
 }
 
 namespace webkit {
@@ -31,6 +32,10 @@ class WebPluginPageDelegate {
       const FilePath& file_path,
       const std::string& mime_type) = 0;
 
+  // Caled to create a replacement plug-in when loading a plug-in failed.
+  virtual WebKit::WebPlugin* CreatePluginReplacement(
+      const FilePath& file_path) = 0;
+
   // Called when a windowed plugin is created.
   // Lets the view delegate create anything it is using to wrap the plugin.
   virtual void CreatedPluginWindow(