Generate methods for Hyphens and HyphenationString in ComputedStyleBase.

third_party/WebKit/Source/core/css/CSSProperties.json5

Index: third_party/WebKit/Source/core/css/CSSProperties.json5
diff --git a/third_party/WebKit/Source/core/css/CSSProperties.json5 b/third_party/WebKit/Source/core/css/CSSProperties.json5
index 6ff56e5afdfe6969b3a849b387e957289f7eac4f..f4888d3576e4af102e5c4eb775fd42140d44769d 100644
--- a/third_party/WebKit/Source/core/css/CSSProperties.json5
+++ b/third_party/WebKit/Source/core/css/CSSProperties.json5
@@ -1272,10 +1272,10 @@
       name: "hyphens",
       inherited: true,
       runtime_flag: "CSSHyphens",
-      field_template: "storage_only",
+      field_template: "keyword",
       type_name: "Hyphens",
-      default_value: "Hyphens::kManual",
-      field_size: 2,
+      keywords: ["none", "manual", "auto"],
+      default_value: "manual",
       field_group: "rare-inherited",
     },
     {
@@ -2424,7 +2424,7 @@
       converter: "ConvertString<CSSValueAuto>",
       inherited: true,
       name_for_methods: "HyphenationString",
-      field_template: "storage_only",
+      field_template: "external",
       type_name: "AtomicString",
       include_paths: ["platform/wtf/text/AtomicString.h"],
       default_value: "AtomicString()",