Emit error events if the loading of an object element failed

components/plugins/renderer/webview_plugin.cc

Index: components/plugins/renderer/webview_plugin.cc
diff --git a/components/plugins/renderer/webview_plugin.cc b/components/plugins/renderer/webview_plugin.cc
index 075515a0779ff784b51c27f377e22cf38aba4a59..0258ca28587baba80a5a9a0af886b302bc338e0d 100644
--- a/components/plugins/renderer/webview_plugin.cc
+++ b/components/plugins/renderer/webview_plugin.cc
@@ -142,6 +142,13 @@ v8::Local<v8::Object> WebViewPlugin::v8ScriptableObject(v8::Isolate* isolate) {
   return delegate_->GetV8ScriptableObject(isolate);
 }
 
+bool WebViewPlugin::isErrorplaceholder() {
+  if (!delegate_)
+    return false;
+
+  return delegate_->IsErrorplaceholder();
+}
+
 void WebViewPlugin::updateAllLifecyclePhases() {
   web_view()->updateAllLifecyclePhases();
 }