Fixed return value for ArrayList#remove in js library.

Removed unnecessary Kotlin.IndexOutOfBounds.

js/js.tests/test/org/jetbrains/k2js/test/semantics/ArrayListTest.java

@@ -48,6 +48,10 @@ public final class ArrayListTest extends JavaClassesTest {
         fooBoxTest();
     }
 
+    public void testRemoveWithIndexOutOfBounds() throws Exception {
+        fooBoxTest();
+    }
+
     public void testToArray() throws Exception {
         fooBoxTest();
     }

js/js.translator/testFiles/java/arrayList/cases/remove.kt

@@ -1,17 +1,13 @@
 package foo
 
-import java.util.ArrayList;
+import java.util.ArrayList
 
 fun box() : Boolean {
-    var i = 0
-    val arr = ArrayList<Int>();
-    while (i++ < 10) {
-        arr.add(i);
+    val arr = ArrayList<Int>()
+    for (i in 0..5) {
+        arr.add(i)
     }
-    arr.remove(2)
-    var sum = 0
-    for (a in arr) {
-        sum += a;
-    }
-    return ((sum == 52)  && (arr[1] == 2) && (arr[2] == 4) && (arr[3] == 5) && (arr[4] == 6) && (arr[8] == 10))
+
+    val removed = arr.remove(2)
+    return arr.size() == 5 && removed == 2 && arr[0] == 0 && arr[1] == 1 && arr[2] == 3 && arr[3] == 4 && arr[4] == 5
 }

js/js.translator/testFiles/java/arrayList/cases/removeWithIndexOutOfBounds.kt

@@ -0,0 +1,30 @@
+package foo
+
+import java.util.ArrayList
+
+fun box() : Boolean {
+    var threwForEmptyList = false
+
+    val arr = ArrayList<Int>()
+    try {
+        arr.remove(2)
+    }
+    catch(e: IndexOutOfBoundsException) {
+      threwForEmptyList = true
+    }
+
+    for (i in 0..10) {
+        arr.add(i)
+    }
+
+    var threwForFilled = false
+
+    try {
+        arr.remove(20)
+    }
+    catch(e: IndexOutOfBoundsException) {
+        threwForFilled = true
+    }
+
+    return threwForEmptyList && threwForFilled
+}

js/js.translator/testFiles/kotlin_lib.js

@@ -75,7 +75,6 @@ var kotlin = {set:function (receiver, key, value) {
 
     Kotlin.Exception = Kotlin.$createClass();
     Kotlin.RuntimeException = Kotlin.$createClass(Kotlin.Exception);
-    Kotlin.IndexOutOfBounds = Kotlin.$createClass(Kotlin.Exception);
     Kotlin.NullPointerException = Kotlin.$createClass(Kotlin.Exception);
     Kotlin.NoSuchElementException = Kotlin.$createClass(Kotlin.Exception);
     Kotlin.IllegalArgumentException = Kotlin.$createClass(Kotlin.Exception);
@@ -205,15 +204,11 @@ var kotlin = {set:function (receiver, key, value) {
             this.$size = 0;
         },
         get: function (index) {
-            if (index < 0 || index >= this.$size) {
-                throw Kotlin.IndexOutOfBounds;
-            }
+            this.checkRange(index);
             return this.array[index];
         },
         set: function (index, value) {
-            if (index < 0 || index >= this.$size) {
-                throw Kotlin.IndexOutOfBounds;
-            }
+            this.checkRange(index);
             this.array[index] = value;
         },
         toArray: function () {
@@ -241,8 +236,9 @@ var kotlin = {set:function (receiver, key, value) {
             this.$size += collection.size();
         },
         removeAt: function (index) {
-            this.array.splice(index, 1);
+            this.checkRange(index);
             this.$size--;
+            return this.array.splice(index, 1)[0];
         },
         clear: function () {
             this.array.length = 0;
@@ -261,6 +257,11 @@ var kotlin = {set:function (receiver, key, value) {
         },
         toJSON: function () {
             return this.array;
+        },
+        checkRange: function(index) {
+            if (index < 0 || index >= this.$size) {
+                throw new Kotlin.IndexOutOfBoundsException();
+            }
         }
     });