Add common test configs for properties that take lengths

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 d7cbdf534e3719deeb03bca63b70674bc6f5b83d..77703db1ec0da96ac4c6c0958fa4ce121c142d5b 100644
--- a/third_party/WebKit/Source/core/css/CSSProperties.json5
+++ b/third_party/WebKit/Source/core/css/CSSProperties.json5
@@ -636,6 +636,8 @@
       converter: "convertLineWidth<float>",
       initial: "initialBorderWidth",
       interpolable: true,
+      keywords: ["thin", "medium", "thick"],
+      typedom_types: ["Length"],
     },
     {
       name: "border-collapse",
@@ -695,6 +697,8 @@
       converter: "convertLineWidth<float>",
       initial: "initialBorderWidth",
       interpolable: true,
+      keywords: ["thin", "medium", "thick"],
+      typedom_types: ["Length"],
     },
     {
       name: "border-right-color",
@@ -714,6 +718,8 @@
       converter: "convertLineWidth<float>",
       initial: "initialBorderWidth",
       interpolable: true,
+      keywords: ["thin", "medium", "thick"],
+      typedom_types: ["Length"],
     },
     {
       name: "border-top-color",
@@ -1088,7 +1094,7 @@
       converter: "convertLengthSizing",
       initial: "initialSize",
       interpolable: true,
-      keywords: ["auto"],
+      keywords: ["auto", "fit-content", "min-content", "max-content"],
       supports_percentage: true,
       typedom_types: ["Length"],
     },
@@ -2326,7 +2332,7 @@
       converter: "convertLengthSizing",
       initial: "initialSize",
       interpolable: true,
-      keywords: ["auto"],
+      keywords: ["auto", "fit-content", "min-content", "max-content"],
       supports_percentage: true,
       typedom_types: ["Length"],
     },