Rename RareInheritedData::variables and RareNonInheritedData::variables.

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

 {
 // This file specifies fields in ComputedStyle that we would like to
 // generate, but are not CSS properties.
 
   parameters: {
     // If true, we do not include this field in ComputedStyleBase::InheritFrom
     // and ComputedStyleBase::CopyNonInheritedFromCached.
     custom_copy: {
       default: false,
     },
@@ skipping 528 matching lines @@
       name: "AppliedTextDecorations",
       inherited: true,
       field_template: "storage_only",
       type_name: "AppliedTextDecorationList",
       include_paths: ["core/style/AppliedTextDecorationList.h"],
       default_value: "nullptr",
       wrapper_pointer_name: "RefPtr",
       field_group: "rare-inherited",
     },
     {
-      name: "Variables",
+      name: "InheritedVariables",
       inherited: true,
       field_template: "storage_only",
       type_name: "StyleInheritedVariables",
       include_paths: ["core/style/StyleInheritedVariables.h"],
       default_value: "nullptr",
       wrapper_pointer_name: "RefPtr",
       field_group: "rare-inherited",
     },
   ],
 }