DOM serialization: fix quoting of < and > in HMTL attribute values.

Source/core/editing/MarkupAccumulator.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 35 matching lines @@
     EntityLt = 0x0002,
     EntityGt = 0x0004,
     EntityQuot = 0x0008,
     EntityNbsp = 0x0010,
 
     // Non-breaking space needs to be escaped in innerHTML for compatibility reason. See http://trac.webkit.org/changeset/32879
     // However, we cannot do this in a XML document because it does not have the entity reference defined (See the bug 19215).
     EntityMaskInCDATA = 0,
     EntityMaskInPCDATA = EntityAmp | EntityLt | EntityGt,
     EntityMaskInHTMLPCDATA = EntityMaskInPCDATA | EntityNbsp,
-    EntityMaskInAttributeValue = EntityAmp | EntityLt | EntityGt | EntityQuot,
-    EntityMaskInHTMLAttributeValue = EntityMaskInAttributeValue | EntityNbsp,
+    EntityMaskInAttributeValue = EntityAmp | EntityQuot | EntityLt | EntityGt,
+    EntityMaskInHTMLAttributeValue = EntityAmp | EntityQuot | EntityNbsp,
 };
 
 struct EntityDescription {
     UChar entity;
     const String& reference;
     EntityMask mask;
 };
 
 class MarkupAccumulator {
     WTF_MAKE_NONCOPYABLE(MarkupAccumulator);
@@ skipping 45 matching lines @@
     void appendQuotedURLAttributeValue(StringBuilder&, const Element*, const Attribute&);
     void serializeNodesWithNamespaces(Node* targetNode, EChildrenOnly, const Namespaces*, Vector<QualifiedName>* tagNamesToSkip);
 
     StringBuilder m_markup;
     const EAbsoluteURLs m_resolveURLsMethod;
 };
 
 }
 
 #endif