Generate enum/getters/setters/mappings for box-sizing.

third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h

Index: third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
diff --git a/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h b/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
index 0fe64a79727c18e7f541dde00ac662ca69bdc6fd..fbb26569ae35c88ad9aebdce86694d6d23c845d6 100644
--- a/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
+++ b/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
@@ -776,34 +776,6 @@ inline BackgroundEdgeOrigin CSSIdentifierValue::ConvertTo() const {
   return kTopEdge;
 }
 
-template <>
-inline CSSIdentifierValue::CSSIdentifierValue(EBoxSizing e)
-    : CSSValue(kIdentifierClass) {
-  switch (e) {
-    case EBoxSizing::kBorderBox:
-      value_id_ = CSSValueBorderBox;
-      break;
-    case EBoxSizing::kContentBox:
-      value_id_ = CSSValueContentBox;
-      break;
-  }
-}
-
-template <>
-inline EBoxSizing CSSIdentifierValue::ConvertTo() const {
-  switch (value_id_) {
-    case CSSValueBorderBox:
-      return EBoxSizing::kBorderBox;
-    case CSSValueContentBox:
-      return EBoxSizing::kContentBox;
-    default:
-      break;
-  }
-
-  NOTREACHED();
-  return EBoxSizing::kBorderBox;
-}
-
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(EBoxLines e)
     : CSSValue(kIdentifierClass) {