Emit error events if the loading of an object element failed

third_party/WebKit/Source/core/html/HTMLPlugInElement.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 410 matching lines @@
 }
 
 bool HTMLPlugInElement::hasCustomFocusLogic() const {
   return !useFallbackContent();
 }
 
 bool HTMLPlugInElement::isPluginElement() const {
   return true;
 }
 
+bool HTMLPlugInElement::isErrorplaceholder() {
+  if (pluginWidget() && (pluginWidget()->isPluginContainer()) &&

[Bernhard Bauer, 2017/04/05 09:56:20]

Nit: Parentheses around the individual expressions aren't necessary
(`pluginWidget() && pluginWidget()->isPluginContainer() &&
pluginWidget()->isErrorplaceholder()` works).

[George Joseph, 2017/04/09 00:41:37]

Done.

+      ((pluginWidget()->isErrorplaceholder())))
+    return true;
+  return false;
+}
+
 void HTMLPlugInElement::disconnectContentFrame() {
   HTMLFrameOwnerElement::disconnectContentFrame();
   setPersistedPluginWidget(nullptr);
 }
 
 bool HTMLPlugInElement::layoutObjectIsFocusable() const {
   if (HTMLFrameOwnerElement::supportsFocus() &&
       HTMLFrameOwnerElement::layoutObjectIsFocusable())
     return true;
 
@@ skipping 209 matching lines @@
 
 void HTMLPlugInElement::lazyReattachIfNeeded() {
   if (!useFallbackContent() && needsPluginUpdate() && layoutObject() &&
       !isImageType()) {
     lazyReattachIfAttached();
     setPersistedPluginWidget(nullptr);
   }
 }
 
 }  // namespace blink