TextBreakIterator should use the C++ icu API instead of the C one

Source/core/rendering/break_lines.cpp

Index: Source/core/rendering/break_lines.cpp
diff --git a/Source/core/rendering/break_lines.cpp b/Source/core/rendering/break_lines.cpp
index d1ab9132e6b52d8b06874e12dcd657592c7fb7d3..e295ab3e461ee9d8506bf515c8c7bfd7399477a1 100644
--- a/Source/core/rendering/break_lines.cpp
+++ b/Source/core/rendering/break_lines.cpp
@@ -164,7 +164,7 @@ static inline int nextBreakablePosition(LazyLineBreakIterator& lazyBreakIterator
                 if (i || priorContextLength) {
                     TextBreakIterator* breakIterator = lazyBreakIterator.get(priorContextLength);
                     if (breakIterator) {
-                        nextBreak = textBreakFollowing(breakIterator, i - 1 + priorContextLength);
+                        nextBreak = breakIterator->following(i - 1 + priorContextLength);
                         if (nextBreak >= 0) {
                             nextBreak -= priorContextLength;
                         }