Make EBoxDecorationBreak an enum class.

third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp

Index: third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp b/third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp
index ecd674a4d7583721027ce5ba583f7140f6ef6cdd..3ccb629a003aa5a9be1522ea1f7ff8471c46fb8a 100644
--- a/third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp
+++ b/third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp
@@ -339,7 +339,7 @@ void InlineFlowBox::DetermineSpacingForFlowBoxes(
     if (!line_box_list->FirstLineBox()->IsConstructed() &&
         !GetLineLayoutItem().IsInlineElementContinuation()) {
       if (GetLineLayoutItem().Style()->BoxDecorationBreak() ==
-          kBoxDecorationBreakClone)
+          EBoxDecorationBreak::kClone)
         include_left_edge = include_right_edge = true;
       else if (ltr && line_box_list->FirstLineBox() == this)
         include_left_edge = true;
@@ -368,7 +368,7 @@ void InlineFlowBox::DetermineSpacingForFlowBoxes(
       // (4) The decoration break is set to clone therefore there will be
       //     borders on every sides.
       if (GetLineLayoutItem().Style()->BoxDecorationBreak() ==
-          kBoxDecorationBreakClone) {
+          EBoxDecorationBreak::kClone) {
         include_left_edge = include_right_edge = true;
       } else if (ltr) {
         if (!NextLineBox() && ((last_line || is_last_object_on_line) &&