observatory: populate 'architecture' in VM, and add numerical vmId in Class.

runtime/bin/vmservice/observatory/lib/src/service/object.dart

Index: runtime/bin/vmservice/observatory/lib/src/service/object.dart
===================================================================
--- runtime/bin/vmservice/observatory/lib/src/service/object.dart	(revision 42084)
+++ runtime/bin/vmservice/observatory/lib/src/service/object.dart	(working copy)
@@ -333,7 +333,8 @@
   @reflectable String relativeLink(String id) => '$id';
 
   @observable String version = 'unknown';
-  @observable String architecture = 'unknown';
+  @observable String targetCPU;
+  @observable int architectureBits;
   @observable double uptime = 0.0;
   @observable bool assertsEnabled = false;
   @observable bool typeChecksEnabled = false;
@@ -557,7 +558,8 @@
     }
     _loaded = true;
     version = map['version'];
-    architecture = map['architecture'];
+    targetCPU = map['targetCPU'];
+    architectureBits = map['architectureBits'];
     uptime = map['uptime'];
     var dateInMillis = int.parse(map['date']);
     lastUpdate = new DateTime.fromMillisecondsSinceEpoch(dateInMillis);
@@ -1438,6 +1440,7 @@
   @observable int endTokenPos;
 
   @observable ServiceMap error;
+  @observable int vmCid;
 
   final Allocations newSpace = new Allocations();
   final Allocations oldSpace = new Allocations();
@@ -1507,6 +1510,9 @@
       superclass._addSubclass(this);
     }
     error = map['error'];
+    var idPrefix = "classes/";
+    assert(id.startsWith(idPrefix));
+    vmCid = int.parse(id.substring(idPrefix.length));
 
     var allocationStats = map['allocationStats'];
     if (allocationStats != null) {