Implement PotentialCustomElementName

third_party/WebKit/Source/platform/text/Character.h

 /*
  * Copyright (C) 2014 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 62 matching lines @@
     static unsigned expansionOpportunityCount(const UChar*, size_t length, TextDirection, bool& isAfterExpansion, const TextJustify);
     static unsigned expansionOpportunityCount(const TextRun& run, bool& isAfterExpansion)
     {
         if (run.is8Bit())
             return expansionOpportunityCount(run.characters8(), run.length(), run.direction(), isAfterExpansion, run.getTextJustify());
         return expansionOpportunityCount(run.characters16(), run.length(), run.direction(), isAfterExpansion, run.getTextJustify());
     }
 
     static bool isUprightInMixedVertical(UChar32 character);
 
+    // https://html.spec.whatwg.org/multipage/scripting.html#prod-potentialcustomelementname
+    static bool isPotentialCustomElementNameChar(UChar32 character);
+
     static bool treatAsSpace(UChar32 c)
     {
         return c == spaceCharacter
             || c == tabulationCharacter
             || c == newlineCharacter
             || c == noBreakSpaceCharacter;
     }
     static bool treatAsZeroWidthSpace(UChar32 c)
     {
         return treatAsZeroWidthSpaceInComplexScript(c)
@@ skipping 59 matching lines @@
 
     static String normalizeSpaces(const LChar*, unsigned length);
     static String normalizeSpaces(const UChar*, unsigned length);
 
     static bool isCommonOrInheritedScript(UChar32);
 };
 
 } // namespace blink
 
 #endif