Improve Code object support in service and observatory

runtime/bin/vmservice/client/lib/observatory.dart

Index: runtime/bin/vmservice/client/lib/observatory.dart
diff --git a/runtime/bin/vmservice/client/lib/observatory.dart b/runtime/bin/vmservice/client/lib/observatory.dart
index 12df3b7c9fa81d4b1e821b1f4f9e48fd0b9b07da..bd5a64c58c4f74f88c1af8c5200a93a72a697e23 100644
--- a/runtime/bin/vmservice/client/lib/observatory.dart
+++ b/runtime/bin/vmservice/client/lib/observatory.dart
@@ -4,12 +4,13 @@ import 'dart:async';
 import 'dart:convert';
 import 'dart:html';
 
-import 'package:dprof/model.dart' as dprof;
+import 'package:logging/logging.dart';
 import 'package:polymer/polymer.dart';
 
 part 'src/observatory/location_manager.dart';
 part 'src/observatory/application.dart';
 part 'src/observatory/isolate.dart';
 part 'src/observatory/isolate_manager.dart';
+part 'src/observatory/model.dart';
 part 'src/observatory/request_manager.dart';
 part 'src/observatory/script_source.dart';