Fix deprecations in testData: js semantics.

js/js.translator/testData/webDemoExamples1/cases/isCheck.kt

@@ -5,6 +5,6 @@ fun main(args: Array<String>) {
 
 fun getStringLength(obj: Any): Int? {
     if (obj is String)
-        return obj.length // no cast to String is needed
+        return obj.length() // no cast to String is needed
     return null
 }

js/js.translator/testData/webDemoExamples1/cases/multiLanguageHello.kt

@@ -1,5 +1,5 @@
 fun main(args: Array<String>) {
-    val language = if (args.size == 0) "EN" else args[0]
+    val language = if (args.size() == 0) "EN" else args[0]
     println(when (language) {
                 "EN" -> "Hello!"
                 "FR" -> "Salut!"

js/js.translator/testData/webDemoExamples1/cases/nullChecks.kt

@@ -10,7 +10,7 @@ fun myParseInt(str: String): Int? {
 }
 
 fun main(args: Array<String>) {
-    if (args.size < 2) {
+    if (args.size() < 2) {
         print("No number supplied");
     }
     else {

js/js.translator/testData/webDemoExamples1/cases/whileLoop.kt

@@ -1,5 +1,5 @@
 fun main(args: Array<String>) {
     var i = 0
-    while (i < args.size)
+    while (i < args.size())
         println(args[i++])
 }