Improve the find word boundary performance

Source/platform/text/TextBoundaries.cpp

Index: Source/platform/text/TextBoundaries.cpp
diff --git a/Source/platform/text/TextBoundaries.cpp b/Source/platform/text/TextBoundaries.cpp
index ccf3c8bada303ec92e38d65c445697dff93b842d..1b295ca90614f4ceba09d16764f9f541415515b0 100644
--- a/Source/platform/text/TextBoundaries.cpp
+++ b/Source/platform/text/TextBoundaries.cpp
@@ -99,5 +99,11 @@ void findWordBoundary(const UChar* chars, int len, int position, int* start, int
     *start = it->previous();
 }
 
+int findWordEndBoundary(const UChar* chars, int len, int position)
+{
+    TextBreakIterator* it = wordBreakIterator(chars, len);
+    int end = it->following(position);
+    return end < 0 ? it->last() : end;
+}
 
 } // namespace blink