Generate StyleBoxData in ComputedStyleBase.

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

Index: third_party/WebKit/Source/core/css/ComputedStyleExtraFields.json5
diff --git a/third_party/WebKit/Source/core/css/ComputedStyleExtraFields.json5 b/third_party/WebKit/Source/core/css/ComputedStyleExtraFields.json5
index e40c8d0c818e10f8d0b750a72efd6b238806a89d..49c5b723331adee8d54a503d0ecbf666c3a80589 100644
--- a/third_party/WebKit/Source/core/css/ComputedStyleExtraFields.json5
+++ b/third_party/WebKit/Source/core/css/ComputedStyleExtraFields.json5
@@ -182,6 +182,13 @@
       default_value: "EVerticalAlign::kBaseline",
       type_name: "EVerticalAlign",
     },
+    {
+      name: "VerticalAlignLength",
+      field_template: "storage_only",
+      default_value: "Length()",
+      field_type_path: "platform/Length",
+      field_group: "box",
+    },
     {
       name: "border",
       field_template: "storage_only",
@@ -219,5 +226,29 @@
       default_value: "true",
       field_group: "visual",
     },
+    {
+      name: "HasAutoZIndex",
+      field_template: "storage_only",
+      type_name: "bool",
+      field_size: 1,
+      field_group: "box",
+      default_value: "true",
+    },
+    {
+      name: "BoxDecorationBreak",
+      field_template: "storage_only",
+      type_name: "EBoxDecorationBreak",
+      field_size: 1,
+      field_group: "box",
+      default_value: "EBoxDecorationBreak::kSlice",
+    },
+    {
+      name: "BoxSizing",
+      field_template: "storage_only",
+      type_name: "EBoxSizing",
+      field_size: 1,
+      field_group: "box",
+      default_value: "EBoxSizing::kContentBox",
+    },
   ],
 }