[inspector] Refactor protocol-test.js

test/inspector/debugger/eval-scopes-expected.txt

+Tests that variables introduced in eval scopes are accessible
 {
     id : <messageId>
     result : {
         result : [
             [0] : {
                 configurable : true
                 enumerable : true
                 isOwn : true
                 name : hest
                 value : {
                     description : 420
                     type : number
                     value : 420
                 }
                 writable : true
             }
         ]
     }
-}
+}