Show a replacement plug-in for loading errors.

webkit/plugins/npapi/webplugin_impl.cc

 // Copyright (c) 2012 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.
 
 #include "webkit/plugins/npapi/webplugin_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
 #include "base/message_loop.h"
@@ skipping 238 matching lines @@
 };
 
 bool WebPluginImpl::initialize(WebPluginContainer* container) {
   if (!page_delegate_) {
     LOG(ERROR) << "No page delegate";
     return false;
   }
 
   WebPluginDelegate* plugin_delegate = page_delegate_->CreatePluginDelegate(
       file_path_, mime_type_);
-  if (!plugin_delegate) {
-    LOG(ERROR) << "Couldn't create plug-in delegate";
+  if (!plugin_delegate)
     return false;
-  }
 
   // Set the container before Initialize because the plugin may
   // synchronously call NPN_GetValue to get its container during its
   // initialization.
   SetContainer(container);
   bool ok = plugin_delegate->Initialize(
       plugin_url_, arg_names_, arg_values_, this, load_manually_);
   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 || !replacement_plugin->initialize(container))
+      return false;
+
+    container->setPlugin(replacement_plugin);
+    return true;
   }
 
   delegate_ = plugin_delegate;
 
   return true;
 }
 
 void WebPluginImpl::destroy() {
   SetContainer(NULL);
   MessageLoop::current()->DeleteSoon(FROM_HERE, this);
@@ skipping 1138 matching lines @@
       webframe_->setReferrerForRequest(*request, plugin_url_);
       break;
 
     default:
       break;
   }
 }
 
 }  // namespace npapi
 }  // namespace webkit