Make TextIndentLine an enum class.

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

Index: third_party/WebKit/Source/core/style/ComputedStyle.h
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.h b/third_party/WebKit/Source/core/style/ComputedStyle.h
index 43a50f38e72e63e93ccdbaceed4dc926c299b7ea..015359129b98846414a1331d8391748a0d1e01eb 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.h
@@ -1664,7 +1664,9 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase<ComputedStyle>,
 
   // text-indent
   static Length InitialTextIndent() { return Length(kFixed); }
-  static TextIndentLine InitialTextIndentLine() { return kTextIndentFirstLine; }
+  static TextIndentLine InitialTextIndentLine() {
+    return TextIndentLine::kFirstLine;
+  }
   static TextIndentType InitialTextIndentType() { return kTextIndentNormal; }
   const Length& TextIndent() const {
     return rare_inherited_data_->text_indent_;
@@ -1679,7 +1681,7 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase<ComputedStyle>,
     SET_VAR(rare_inherited_data_, text_indent_, v);
   }
   void SetTextIndentLine(TextIndentLine v) {
-    SET_VAR(rare_inherited_data_, text_indent_line_, v);
+    SET_VAR(rare_inherited_data_, text_indent_line_, static_cast<unsigned>(v));
   }
   void SetTextIndentType(TextIndentType v) {
     SET_VAR(rare_inherited_data_, text_indent_type_, v);