KJS: extract string polyfills to separate file

js/js.translator/testData/kotlin_lib.js

@@ -14,29 +14,6 @@
  * limitations under the License.
  */
 
-// Shims for String
-if (typeof String.prototype.startsWith === "undefined") {
-    String.prototype.startsWith = function(searchString, position) {
-        position = position || 0;
-        return this.lastIndexOf(searchString, position) === position;
-    };
-}
-if (typeof String.prototype.endsWith === "undefined") {
-    String.prototype.endsWith = function(searchString, position) {
-        var subjectString = this.toString();
-        if (position === undefined || position > subjectString.length) {
-            position = subjectString.length;
-        }
-        position -= searchString.length;
-        var lastIndex = subjectString.indexOf(searchString, position);
-        return lastIndex !== -1 && lastIndex === position;
-    };
-}
-
-String.prototype.contains = function (s) {
-    return this.indexOf(s) !== -1;
-};
-
 // Kotlin stdlib
 
 Kotlin.equals = function (obj1, obj2) {

js/js.translator/testData/kotlin_polyfills.js

@@ -0,0 +1,38 @@
+/**
+ * Copyright 2010 Tim Down.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Shims for String
+if (typeof String.prototype.startsWith === "undefined") {
+    String.prototype.startsWith = function(searchString, position) {
+        position = position || 0;
+        return this.lastIndexOf(searchString, position) === position;
+    };
+}
+if (typeof String.prototype.endsWith === "undefined") {
+    String.prototype.endsWith = function(searchString, position) {
+        var subjectString = this.toString();
+        if (position === undefined || position > subjectString.length) {
+            position = subjectString.length;
+        }
+        position -= searchString.length;
+        var lastIndex = subjectString.indexOf(searchString, position);
+        return lastIndex !== -1 && lastIndex === position;
+    };
+}
+
+String.prototype.contains = function (s) {
+    return this.indexOf(s) !== -1;
+};