Add NativeEnqueuer to work with the Enqueuer.

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

Index: sdk/lib/_internal/compiler/implementation/lib/interceptors.dart
diff --git a/sdk/lib/_internal/compiler/implementation/lib/interceptors.dart b/sdk/lib/_internal/compiler/implementation/lib/interceptors.dart
index 2fc25a6fb80f706916b405d3a7fa2ea9a99b107f..bfb2bfb662e16369174211da2d85c7e15d70466d 100644
--- a/sdk/lib/_internal/compiler/implementation/lib/interceptors.dart
+++ b/sdk/lib/_internal/compiler/implementation/lib/interceptors.dart
@@ -9,7 +9,7 @@
 add$1(var receiver, var value) {
   if (isJsArray(receiver)) {
     checkGrowable(receiver, 'add');
-    JS('Object', r'#.push(#)', receiver, value);
+    JS('void', r'#.push(#)', receiver, value);
     return;
   }
   return UNINTERCEPTED(receiver.add(value));
@@ -22,7 +22,7 @@ removeAt$1(var receiver, var index) {
       throw new RangeError.value(index);
     }
     checkGrowable(receiver, 'removeAt');
-    return JS("Object", r'#.splice(#, 1)[0]', receiver, index);
+    return JS('var', r'#.splice(#, 1)[0]', receiver, index);
   }
   return UNINTERCEPTED(receiver.removeAt(index));
 }
@@ -31,7 +31,7 @@ removeLast(var receiver) {
   if (isJsArray(receiver)) {
     checkGrowable(receiver, 'removeLast');
     if (receiver.length == 0) throw new RangeError.value(-1);
-    return JS('Object', r'#.pop()', receiver);
+    return JS('var', r'#.pop()', receiver);
   }
   return UNINTERCEPTED(receiver.removeLast());
 }
@@ -46,7 +46,7 @@ filter(var receiver, var predicate) {
 
 get$length(var receiver) {
   if (receiver is String || isJsArray(receiver)) {
-    return JS('num', r'#.length', receiver);
+    return JS('num', r'#.length', receiver);  // TODO(sra): Use 'int'?
   } else {
     return UNINTERCEPTED(receiver.length);
   }
@@ -80,7 +80,7 @@ toString(var value) {
   if (JS('bool', r'typeof # == "function"', value)) {
     return 'Closure';
   }
-  return JS('string', r'String(#)', value);
+  return JS('String', r'String(#)', value);
 }
 
 iterator(receiver) {
@@ -154,7 +154,7 @@ addLast(receiver, value) {
   if (!isJsArray(receiver)) return UNINTERCEPTED(receiver.addLast(value));
 
   checkGrowable(receiver, 'addLast');
-  JS('Object', r'#.push(#)', receiver, value);
+  JS('void', r'#.push(#)', receiver, value);
 }
 
 clear(receiver) {
@@ -202,7 +202,8 @@ getRange(receiver, start, length) {
     throw new RangeError.value(length);
   }
   if (length < 0) throw new ArgumentError(length);
-  return JS('Object', r'#.slice(#, #)', receiver, start, end);
+  // TODO(sra): We need a type that is exactly the JavaScript Array type.
+  return JS('List', r'#.slice(#, #)', receiver, start, end);
 }
 
 indexOf$1(receiver, element) {