Refactor List.setRange function.

sdk/lib/_internal/compiler/implementation/lib/js_array.dart

Index: sdk/lib/_internal/compiler/implementation/lib/js_array.dart
diff --git a/sdk/lib/_internal/compiler/implementation/lib/js_array.dart b/sdk/lib/_internal/compiler/implementation/lib/js_array.dart
index da66bb1274d40190e00f729fcbaff35231e68126..c3065eb261c1e0cd8c9de9c8ab5b1e2a7c76c40f 100644
--- a/sdk/lib/_internal/compiler/implementation/lib/js_array.dart
+++ b/sdk/lib/_internal/compiler/implementation/lib/js_array.dart
@@ -241,9 +241,9 @@ class JSArray<E> extends Interceptor implements List<E>, JSIndexable {
     this.length = receiverLength - length;
   }
 
-  void setRange(int start, int length, List<E> from, [int startFrom = 0]) {
+  void setRange(int start, int end, List<E> from, [int startFrom = 0]) {
     checkMutable(this, 'set range');
-    IterableMixinWorkaround.setRangeList(this, start, length, from, startFrom);
+    IterableMixinWorkaround.setRangeList(this, start, end, from, startFrom);
   }
 
   bool any(bool f(E element)) => IterableMixinWorkaround.any(this, f);