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 63f4b4e008b709db9701802ebe74ed97815575b4..cdb6d9b3db31f5827bde0b17d7dc38d604f5a7eb 100644
--- a/sdk/lib/_internal/compiler/implementation/lib/interceptors.dart
+++ b/sdk/lib/_internal/compiler/implementation/lib/interceptors.dart
@@ -44,7 +44,7 @@ getInterceptor(object) {
 add$1(var receiver, var value) {
   if (isJsArray(receiver)) {
     checkGrowable(receiver, 'add');
-    JS('Object', r'#.push(#)', receiver, value);
+    JS('void', r'#.push(#)', receiver, value);

[ahe, 2012/11/14 13:51:30]

I'm not sure what void means here.  I think Nicolas has asked me to not use void
in JS, but I never understood why.

[ngeoffray, 2012/11/14 21:17:39]

I can't remember if I  said not to use 'void', but in any case it's something
the backend can understand.

[sra1, 2012/11/15 00:09:10]

I have been using 'void' to mean that the value of 'JS' is unused.
This is good for native live class analysis, since if a native class is returned
by JS but ignored, it did not really enter the Dart code.

I'd rather use 'void' than invent something new that means the same.

     return;
   }
   return UNINTERCEPTED(receiver.add(value));
@@ -57,7 +57,7 @@ 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));
 }
@@ -66,7 +66,7 @@ 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());
 }
@@ -81,7 +81,7 @@ 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'?

[ngeoffray, 2012/11/14 21:17:39]

yes

[sra1, 2012/11/15 00:09:10]

I expect the interceptor work will take care of this.

   } else {
     return UNINTERCEPTED(receiver.length);
   }
@@ -115,7 +115,7 @@ 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) {
@@ -178,7 +178,7 @@ 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) {
@@ -226,7 +226,8 @@ 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) {
@@ -593,7 +594,7 @@ split(receiver, pattern) {
 splitChars(receiver) {
   if (receiver is !String) return UNINTERCEPTED(receiver.splitChars());
 
-  return JS('List', r'#.split("")', receiver);
+  return JS('=List', r'#.split("")', receiver);
 }
 
 startsWith(receiver, other) {