Optimize complex text shaping

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 54 matching lines @@
             || c == characterTabulation
             || c == newlineCharacter
             || c == noBreakSpace;
     }
     static bool treatAsZeroWidthSpace(UChar c)
     {
         return treatAsZeroWidthSpaceInComplexScript(c)
             || c == zeroWidthNonJoiner
             || c == zeroWidthJoiner;
     }
-    static bool treatAsZeroWidthSpaceInComplexScript(UChar c)
+    static bool treatAsZeroWidthSpaceInComplexScript(UChar32 c)
     {
         return c < 0x20 // ASCII Control Characters
             || (c >= 0x7F && c < 0xA0) // ASCII Delete .. No-break space
             || c == softHyphen
             || c == zeroWidthSpace
             || (c >= leftToRightMark && c <= rightToLeftMark)
             || (c >= leftToRightEmbed && c <= rightToLeftOverride)
             || c == zeroWidthNoBreakSpace
             || c == objectReplacementCharacter;
     }
+    static bool treatAsZeroWidthSpaceInComplexScript(LChar c)
+    {
+        return c < 0x20 // ASCII Control Characters
+            || (c >= 0x7F && c < 0xA0) // ASCII Delete .. No-break space
+            || c == softHyphen;
+    }
     static bool canReceiveTextEmphasis(UChar32);
 
     static inline UChar normalizeSpaces(UChar character)
     {
         if (treatAsSpace(character))
             return space;
 
         if (treatAsZeroWidthSpace(character))
             return zeroWidthSpace;
 
@@ skipping 14 matching lines @@
     static String normalizeSpaces(const LChar*, unsigned length);
     static String normalizeSpaces(const UChar*, unsigned length);
 
 private:
     Character();
 };
 
 } // namespace blink
 
 #endif