Emit error events if the loading of an object element failed

third_party/WebKit/public/web/WebPlugin.h

 /*
  * Copyright (C) 2009, 2012 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 115 matching lines @@
                                       WebDragOperationsMask,
                                       const WebPoint& position,
                                       const WebPoint& screenPosition) {
     return false;
   }
 
   virtual void didReceiveResponse(const WebURLResponse&) = 0;
   virtual void didReceiveData(const char* data, int dataLength) = 0;
   virtual void didFinishLoading() = 0;
   virtual void didFailLoading(const WebURLError&) = 0;
+  virtual bool isErrorPlaceholder() { return false; };

[Bernhard Bauer, 2017/03/30 09:08:28]

Move this down, maybe to isPlaceholder()? The method up here have little to do
with it. And then maybe add a comment, in particular explaining the difference
between isPlaceholder() and isErrorPlaceholder()?

 
   // Printing interface.
   // Whether the plugin supports its own paginated print. The other print
   // interface methods are called only if this method returns true.
   virtual bool supportsPaginatedPrint() { return false; }
   // Returns true if the printed content should not be scaled to
   // the printer's printable area.
   virtual bool isPrintScalingDisabled() { return false; }
   // Returns true on success and sets the out parameter to the print preset
   // options for the document.
@@ skipping 93 matching lines @@
 
   virtual bool isPlaceholder() { return true; }
 
  protected:
   ~WebPlugin() {}
 };
 
 }  // namespace blink
 
 #endif