Catch up the spec update in CSS Rhythmic Sizing

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

 {
 // This file specifies all the CSS properties we support and the necessary
 // information for our code generation. The various supported arguments
 // are described below with example usage
 
   parameters: {
     // - alias_for: "other-property"
     // Properties specifying alias_for should be virtually identical to the
     // properties they alias. Minor parsing differences are allowed as long as
     // the CSSValues created are of the same format of the aliased property.
@@ skipping 1152 matching lines @@
       svg: true,
     },
     {
       name: "line-height",
       converter: "convertLineHeight",
       getter: "specifiedLineHeight",
       inherited: true,
       interpolable: true,
     },
     {
+      name: "line-height-step",
+      api_class: true,
+      api_methods: ["parseSingleValue"],
+      converter: "convertComputedLength<uint8_t>",
+      inherited: true,
+      runtime_flag: "CSSSnapSize",
+    },
+    {
       name: "list-style-image",
       api_class: "CSSPropertyAPIImage",
       api_methods: ["parseSingleValue"],
       custom_value: true,
       inherited: true,
       interpolable: true,
       typedom_types: ["Image"],
     },
     {
       name: "list-style-position",
@@ skipping 427 matching lines @@
       inherited: true,
       svg: true,
     },
     {
       name: "size",
       api_class: true,
       api_methods: ["parseSingleValue"],
       custom_all: true,
     },
     {
-      name: "snap-height",
-      api_class: true,
-      api_methods: ["parseSingleValue"],
-      custom_all: true,
-      inherited: true,
-      runtime_flag: "CSSSnapSize",
-    },
-    {
       name: "speak",
       inherited: true,
     },
     {
       name: "stop-color",
       api_class: "CSSPropertyAPIColor",
       api_methods: ["parseSingleValue"],
       converter: "convertColor",
       interpolable: true,
       svg: true,
@@ skipping 1453 matching lines @@
     {
       name: "-webkit-transition-timing-function",
       alias_for: "transition-timing-function",
     },
     {
       name: "-webkit-user-select",
       alias_for: "user-select",
     },
   ],
 }