Do not send pings for anchor elements in MHTML pages

third_party/WebKit/Source/web/WebFrameSerializer.cpp

 /*
  * Copyright (C) 2009 Google Inc. 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 177 matching lines @@
 bool MHTMLFrameSerializerDelegate::ShouldIgnoreAttribute(
     const Element& element,
     const Attribute& attribute) {
   // TODO(fgorski): Presence of srcset attribute causes MHTML to not display
   // images, as only the value of src is pulled into the archive. Discarding
   // srcset prevents the problem. Long term we should make sure to MHTML plays
   // nicely with srcset.
   if (attribute.LocalName() == HTMLNames::srcsetAttr)
     return true;
 
+  // Do not save ping attribute since anyway the ping will be blocked from
+  // MHTML.
+  if (isHTMLAnchorElement(element) &&
+      attribute.LocalName() == HTMLNames::pingAttr) {
+    return true;
+  }
+
   // If srcdoc attribute for frame elements will be rewritten as src attribute
   // containing link instead of html contents, don't ignore the attribute.
   // Bail out now to avoid the check in Element::isScriptingAttribute.
   bool is_src_doc_attribute = IsHTMLFrameElementBase(element) &&
                               attribute.GetName() == HTMLNames::srcdocAttr;
   String new_link_for_the_element;
   if (is_src_doc_attribute && RewriteLink(element, new_link_for_the_element))
     return false;
 
   // Do not include attributes that contain javascript. This is because the
@@ skipping 264 matching lines @@
     const WebString& base_target) {
   // TODO(yosin) We should call |FrameSerializer::baseTagDeclarationOf()|.
   if (base_target.IsEmpty())
     return String("<base href=\".\">");
   String base_string = "<base href=\".\" target=\"" +
                        static_cast<const String&>(base_target) + "\">";
   return base_string;
 }
 
 }  // namespace blink