Moved clear property to be generated in ComputedStyleBase.

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 736 matching lines @@
       keyword_only: true,
       keywords: ["top", "bottom", "left", "right"],
     },
     {
       name: "caret-color",
       api_class: true,
       custom_all: true,
       inherited: true,
       interpolable: true,
     },
-    "clear",
+    {
+      name: "clear",
+      initial_keyword: "none",
+      keyword_only: true,
+      keywords: ["none", "left", "right", "both"],
+    },
     {
       name: "clip",
       api_class: true,
       converter: "convertClip",
       custom_all: true,
       interpolable: true,
     },
     {
       name: "clip-path",
       api_class: true,
@@ skipping 2040 matching lines @@
     {
       name: "-webkit-transition-timing-function",
       alias_for: "transition-timing-function",
     },
     {
       name: "-webkit-user-select",
       alias_for: "user-select",
     },
   ],
 }