[inspector] Refactor protocol-test.js

test/inspector/runtime/console-line-and-column-expected.txt

+Tests line and column numbers in console messages
 {
     method : Runtime.consoleAPICalled
     params : {
         args : [
             [0] : {
                 description : 239
                 type : number
                 value : 239
             }
         ]
@@ skipping 31 matching lines @@
                     functionName : 
                     lineNumber : 1
                     scriptId : <scriptId>
                     url : 
                 }
             ]
         }
         timestamp : <timestamp>
         type : log
     }
-}
+}