Use the great new Devtools API for custom formatters. Now Dart objects are now generally as easy to…

lib/runtime/dart_library.js

Index: lib/runtime/dart_library.js
diff --git a/lib/runtime/dart_library.js b/lib/runtime/dart_library.js
index 223744939e9190cb5cc453bca953af992d60793c..3200ad13527ba0b6394504d02406fd5561ae4230 100644
--- a/lib/runtime/dart_library.js
+++ b/lib/runtime/dart_library.js
@@ -147,6 +147,11 @@ var dart_library =
       DOMTokenList.prototype.get = function(i) { return this[i]; };
       HTMLCollection.prototype.get = function(i) { return this[i]; };
     }
+
+    // This import is only needed for chrome debugging. We should provide an
+    // option to compile without it.
+    var devtoolsDebugger = import_('dart/_debugger');
+    devtoolsDebugger.registerDevtoolsFormatter();
   }
 
 })(dart_library);