Improve the find word boundary performance

Source/core/editing/VisibleUnits.cpp

Index: Source/core/editing/VisibleUnits.cpp
diff --git a/Source/core/editing/VisibleUnits.cpp b/Source/core/editing/VisibleUnits.cpp
index 46273a7ee38cc4ca179ecb2289f49d8c7f4c2014..c699c4207808deb9b199ef0769f859db4e06b06b 100644
--- a/Source/core/editing/VisibleUnits.cpp
+++ b/Source/core/editing/VisibleUnits.cpp
@@ -653,9 +653,7 @@ static unsigned endWordBoundary(const UChar* characters, unsigned length, unsign
         return length;
     }
     needMoreContext = false;
-    int start, end;
-    findWordBoundary(characters, length, offset, &start, &end);
-    return end;
+    return findWordEndBoundary(characters, length, offset);
 }
 
 VisiblePosition endOfWord(const VisiblePosition &c, EWordSide side)