Implement IsolateMirror.

dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart

Index: dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart b/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
index 4b1228f483387419e17bc1bfdf8df9f6d98cf2e6..0f7d23a82b35d549b9ff304d300b9c172057b406 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
@@ -3755,7 +3755,11 @@ if (typeof document !== "undefined" && document.readyState !== "complete") {
                 ..write(',$_')
                 ..write('{$n')
                 ..addBuffer(buffer)
-                ..write('}],$n');
+                ..write('}');
+            if (library == compiler.mainApp) {
+              mainBuffer.write(',${n}1');
+            }
+            mainBuffer.write('],$n');
           }
           buffer = buffers[1];
           if (buffer != null) {
@@ -3976,6 +3980,7 @@ if (typeof document !== "undefined" && document.readyState !== "complete") {
     var uri = data[1];
     var metadata = data[2];
     var descriptor = data[3];
+    var isRoot = !!data[4];

[kustermann, 2013/07/25 14:56:45]

I guess this double negation is because the last parameter is optional?

[ahe, 2013/07/25 18:01:01]

Yes. We use it so frequently in dart2js that we don't normally document it.

It is important for checked mode.

     var fields = descriptor && descriptor[""];
     var classes = [];
     var functions = [];
@@ -4017,7 +4022,7 @@ if (typeof document !== "undefined" && document.readyState !== "complete") {
       }
     }
     processStatics(descriptor);
-    libraries.push([name, uri, classes, functions, metadata, fields]);
+    libraries.push([name, uri, classes, functions, metadata, fields, isRoot]);
   }
 })''';
   }