Improve performance of Character::isCJKIdeographOrSymbol by using trie tree

third_party/WebKit/Source/platform/fonts/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 43 matching lines @@
     }
 
     static inline bool isUnicodeVariationSelector(UChar32 character)
     {
         // http://www.unicode.org/Public/UCD/latest/ucd/StandardizedVariants.html
         return isInRange(character, 0x180B, 0x180D) // MONGOLIAN FREE VARIATION SELECTOR ONE to THREE
             || isInRange(character, 0xFE00, 0xFE0F) // VARIATION SELECTOR-1 to 16
             || isInRange(character, 0xE0100, 0xE01EF); // VARIATION SELECTOR-17 to 256
     }
 
-    static bool isCJKIdeograph(UChar32);
     static bool isCJKIdeographOrSymbol(UChar32);
 
     static unsigned expansionOpportunityCount(const LChar*, size_t length, TextDirection, bool& isAfterExpansion, const TextJustify);
     static unsigned expansionOpportunityCount(const UChar*, size_t length, TextDirection, bool& isAfterExpansion, const TextJustify);
 
     static bool isUprightInMixedVertical(UChar32 character);
 
     static bool treatAsSpace(UChar c)
     {
         return c == spaceCharacter
@@ skipping 49 matching lines @@
 
     static String normalizeSpaces(const LChar*, unsigned length);
     static String normalizeSpaces(const UChar*, unsigned length);
 
     static bool isCommonOrInheritedScript(UChar32);
 };
 
 } // namespace blink
 
 #endif