Make ELineBreak an enum class.

third_party/WebKit/Source/core/style/ComputedStyle.cpp

Index: third_party/WebKit/Source/core/style/ComputedStyle.cpp
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.cpp b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
index 23ccc5c2f19d7cd6ad1ec263e48846cf1e9f7e9b..698224a3a428d6c30ff3bbdbba4b64a853ee8feb 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.cpp
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.cpp
@@ -1579,16 +1579,16 @@ void ComputedStyle::ClearResetDirectives() {
 AtomicString ComputedStyle::LocaleForLineBreakIterator() const {
   LineBreakIteratorMode mode = LineBreakIteratorMode::kDefault;
   switch (GetLineBreak()) {
-    case kLineBreakAuto:
-    case kLineBreakAfterWhiteSpace:
+    case LineBreak::kAuto:
+    case LineBreak::kAfterWhiteSpace:
       return Locale();
-    case kLineBreakNormal:
+    case LineBreak::kNormal:
       mode = LineBreakIteratorMode::kNormal;
       break;
-    case kLineBreakStrict:
+    case LineBreak::kStrict:
       mode = LineBreakIteratorMode::kStrict;
       break;
-    case kLineBreakLoose:
+    case LineBreak::kLoose:
       mode = LineBreakIteratorMode::kLoose;
       break;
   }