Support displaying of types in the observatory (back-end only for now):

runtime/vm/isolate.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/isolate.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/json.h"
 #include "lib/mirrors.h"
@@ skipping 891 matching lines @@
   jsobj.AddProperty("live_ports", live_ports);
   jsobj.AddProperty("control_ports", control_ports);
   jsobj.AddProperty("paused_on_exit", paused_on_exit);
   jsobj.AddProperty("paused_on_start", pause_on_start);
   jsobj.AddProperty("pause_on_exit", pause_on_exit);
   const Library& lib =
       Library::Handle(object_store()->root_library());
   jsobj.AddProperty("rootLib", lib);
 
   timer_list().PrintTimersToJSONProperty(&jsobj);
+
+  {
+    JSONObject typeargsRef(&jsobj, "canonicalTypeArguments");
+    typeargsRef.AddProperty("type", "@TypeArgumentsList");
+    typeargsRef.AddProperty("id", "typearguments");
+    typeargsRef.AddProperty("name", "canonical type arguments");
+  }
 }
 
 
 void Isolate::VisitIsolates(IsolateVisitor* visitor) {
   if (visitor == NULL) {
     return;
   }
   MonitorLocker ml(isolates_list_monitor_);
   Isolate* current = isolates_list_head_;
   while (current) {
@@ skipping 152 matching lines @@
   return func.raw();
 }
 
 
 void IsolateSpawnState::Cleanup() {
   SwitchIsolateScope switch_scope(isolate());
   Dart::ShutdownIsolate();
 }
 
 }  // namespace dart