Remove hidden elements from MHTML

third_party/WebKit/Source/core/frame/FrameSerializer.h

 /*
  * Copyright (C) 2011 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 49 matching lines @@
 
 // This class is used to serialize frame's contents back to text (typically
 // HTML).  It serializes frame's document and resources such as images and CSS
 // stylesheets.
 class CORE_EXPORT FrameSerializer final {
   STACK_ALLOCATED();
 
  public:
   class Delegate {
    public:
+    // Controls whether HTML serialization should skip the given element.
+    virtual bool shouldIgnoreElement(const Element&) { return false; }
+
     // Controls whether HTML serialization should skip the given attribute.
     virtual bool shouldIgnoreAttribute(const Element&, const Attribute&) {
       return false;
     }
 
     // Method allowing the Delegate control which URLs are written into the
     // generated html document.
     //
     // When URL of the element needs to be rewritten, this method should
     // return true and populate |rewrittenLink| with a desired value of the
@@ skipping 52 matching lines @@
   HashSet<KURL> m_resourceURLs;
 
   bool m_isSerializingCss;
 
   Delegate& m_delegate;
 };
 
 }  // namespace blink
 
 #endif  // FrameSerializer_h