Emit error events if the loading of an object element failed

third_party/WebKit/Source/web/WebPluginContainerImpl.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2014 Opera Software ASA. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 76 matching lines @@
   void paint(GraphicsContext&, const CullRect&) const override;
   void invalidateRect(const IntRect&) override;
   void setFocused(bool, WebFocusType) override;
   void show() override;
   void hide() override;
   void handleEvent(Event*) override;
   void frameRectsChanged() override;
   void setParentVisible(bool) override;
   void widgetGeometryMayHaveChanged() override;
   bool isPluginContainer() const override { return true; }
+  bool isPlaceholder() override;
+
   void eventListenersRemoved() override;
 
   // WebPluginContainer methods
   WebElement element() override;
   WebDocument document() override;
   void dispatchProgressEvent(const WebString& type,
                              bool lengthComputable,
                              unsigned long long loaded,
                              unsigned long long total,
                              const WebString& url) override;
@@ skipping 122 matching lines @@
 // WebPluginContainerImpl is the only subclass of WebPluginContainer.
 DEFINE_TYPE_CASTS(WebPluginContainerImpl,
                   WebPluginContainer,
                   container,
                   true,
                   true);
 
 }  // namespace blink
 
 #endif