Move border-*-width out of BorderValue and store on SurroundData in ComputedStyle instead

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 4b6a5dd71779fb3287e8ce7cd56e55f36bd4509a..6a55bef72293dfe688f126e5d372e613d6fe5bf2 100644
--- a/third_party/WebKit/Source/core/css/CSSProperties.json5
+++ b/third_party/WebKit/Source/core/css/CSSProperties.json5
@@ -676,10 +676,13 @@
       name: "border-bottom-width",
       api_class: "CSSPropertyAPIBorderWidth",
       converter: "ConvertLineWidth<float>",
-      initial: "InitialBorderWidth",
       interpolable: true,
       keywords: ["thin", "medium", "thick"],
       typedom_types: ["Length"],
+      field_template: "primitive",
+      type_name: "float",
+      default_value: "3",
+      field_group: "surround",
     },
     {
       name: "border-collapse",
@@ -737,10 +740,13 @@
       name: "border-left-width",
       api_class: "CSSPropertyAPIBorderWidth",
       converter: "ConvertLineWidth<float>",
-      initial: "InitialBorderWidth",
       interpolable: true,
       keywords: ["thin", "medium", "thick"],
       typedom_types: ["Length"],
+      field_template: "primitive",
+      type_name: "float",
+      default_value: "3",
+      field_group: "surround",
     },
     {
       name: "border-right-color",
@@ -758,10 +764,13 @@
       name: "border-right-width",
       api_class: "CSSPropertyAPIBorderWidth",
       converter: "ConvertLineWidth<float>",
-      initial: "InitialBorderWidth",
       interpolable: true,
       keywords: ["thin", "medium", "thick"],
       typedom_types: ["Length"],
+      field_template: "primitive",
+      type_name: "float",
+      default_value: "3",
+      field_group: "surround",
     },
     {
       name: "border-top-color",
@@ -801,11 +810,14 @@
       name: "border-top-width",
       api_class: "CSSPropertyAPIBorderWidth",
       converter: "ConvertLineWidth<float>",
-      initial: "InitialBorderWidth",
       interpolable: true,
       keywords: ["thin", "medium", "thick"],
       supports_percentage: true,
       typedom_types: ["Length"],
+      field_template: "primitive",
+      type_name: "float",
+      default_value: "3",
+      field_group: "surround",
     },
     {
       name: "bottom",