Show a replacement plug-in for loading errors.

webkit/plugins/npapi/webplugin_impl.cc

Index: webkit/plugins/npapi/webplugin_impl.cc
diff --git a/webkit/plugins/npapi/webplugin_impl.cc b/webkit/plugins/npapi/webplugin_impl.cc
index f776559aa1b770a4b3e9f5ca0504edb7219485ba..6c1688dfa81e46741f15771974aca7232e32af9c 100644
--- a/webkit/plugins/npapi/webplugin_impl.cc
+++ b/webkit/plugins/npapi/webplugin_impl.cc
@@ -270,7 +270,15 @@ bool WebPluginImpl::initialize(WebPluginContainer* container) {
   if (!ok) {
     LOG(ERROR) << "Couldn't initialize plug-in";
     plugin_delegate->PluginDestroyed();
-    return false;
+
+    WebKit::WebPlugin* replacement_plugin =
+        page_delegate_->CreatePluginReplacement(file_path_);
+    if (!replacement_plugin->initialize(container)) {
+      LOG(ERROR) << "Couldn't initialize replacement plug-in";
+      return false;
+    }
+    container->setPlugin(replacement_plugin);
+    return true;
   }
 
   delegate_ = plugin_delegate;