Optimize complex text shaping

Source/platform/fonts/Character.h

Index: Source/platform/fonts/Character.h
diff --git a/Source/platform/fonts/Character.h b/Source/platform/fonts/Character.h
index ca0666a6fcdf97ac4a7b1dd5499578b51858df96..3162e71a8c1b34b27971e5ab7d6a48a6e18b76ad 100644
--- a/Source/platform/fonts/Character.h
+++ b/Source/platform/fonts/Character.h
@@ -72,7 +72,7 @@ public:
             || 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
@@ -83,6 +83,12 @@ public:
             || 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)