Emit error events if the loading of an object element failed

components/plugins/renderer/plugin_placeholder.cc

 // Copyright 2013 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 "components/plugins/renderer/plugin_placeholder.h"
 
 #include "base/strings/string_util.h"
 #include "content/public/common/web_preferences.h"
 #include "content/public/renderer/render_frame.h"
 #include "content/public/renderer/render_thread.h"
@@ skipping 120 matching lines @@
     : PluginPlaceholderBase(render_frame, frame, params, html_data) {
 }
 
 PluginPlaceholder::~PluginPlaceholder() {
 }
 
 v8::Local<v8::Value> PluginPlaceholder::GetV8Handle(v8::Isolate* isolate) {
   return gin::CreateHandle(isolate, this).ToV8();
 }
 
+bool PluginPlaceholderBase::IsErrorPlaceholder() {
+  return false;
+}
+
 gin::ObjectTemplateBuilder PluginPlaceholder::GetObjectTemplateBuilder(
     v8::Isolate* isolate) {
   return gin::Wrappable<PluginPlaceholder>::GetObjectTemplateBuilder(isolate)
       .SetMethod<void (plugins::PluginPlaceholder::*)()>(
           "hide", &PluginPlaceholder::HideCallback);
 }
 
 }  // namespace plugins