Make TextAlignLast 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 9823d00a0dcc8a64af401490b4aef5d22413a90f..3bc943427c6fcce8469a6305034114c3569ac62c 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.h
@@ -1702,12 +1702,12 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase<ComputedStyle>,
   }
 
   // text-align-last
-  static TextAlignLast InitialTextAlignLast() { return kTextAlignLastAuto; }
+  static TextAlignLast InitialTextAlignLast() { return TextAlignLast::kAuto; }
   TextAlignLast GetTextAlignLast() const {
     return static_cast<TextAlignLast>(rare_inherited_data_->text_align_last_);
   }
   void SetTextAlignLast(TextAlignLast v) {
-    SET_VAR(rare_inherited_data_, text_align_last_, v);
+    SET_VAR(rare_inherited_data_, text_align_last_, static_cast<unsigned>(v));
   }
 
   // text-combine-upright (aka -webkit-text-combine, -epub-text-combine)