Fix line break at element boundary when 8bit element follows 16bit

third_party/WebKit/Source/platform/text/TextBreakIterator.cpp

Index: third_party/WebKit/Source/platform/text/TextBreakIterator.cpp
diff --git a/third_party/WebKit/Source/platform/text/TextBreakIterator.cpp b/third_party/WebKit/Source/platform/text/TextBreakIterator.cpp
index 438911f1b266e8dde4fe5ea287042213dd3d4689..a908f0a8980611e4e578fef72c7e06ce187e17bb 100644
--- a/third_party/WebKit/Source/platform/text/TextBreakIterator.cpp
+++ b/third_party/WebKit/Source/platform/text/TextBreakIterator.cpp
@@ -255,12 +255,9 @@ static inline int nextBreakablePosition(
   int len = static_cast<int>(length);
   int nextBreak = -1;
 
-  CharacterType lastLastCh =
-      pos > 1 ? str[pos - 2] : static_cast<CharacterType>(
-                                   lazyBreakIterator.secondToLastCharacter());
-  CharacterType lastCh =
-      pos > 0 ? str[pos - 1]
-              : static_cast<CharacterType>(lazyBreakIterator.lastCharacter());
+  UChar lastLastCh =
+      pos > 1 ? str[pos - 2] : lazyBreakIterator.secondToLastCharacter();
+  UChar lastCh = pos > 0 ? str[pos - 1] : lazyBreakIterator.lastCharacter();
   ULineBreak lastLineBreak;
   if (lineBreakType == LineBreakType::BreakAll)
     lastLineBreak = lineBreakPropertyValue(lastLastCh, lastCh);