First cut at _spawnUri rpc in the vm service.

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

 // Copyright (c) 2014, 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.
 
 part of service;
 
 // Some value smaller than the object ring, so requesting a large array
 // doesn't result in an expired ref because the elements lapped it in the
 // object ring.
 const int kDefaultFieldLimit = 100;
@@ skipping 1868 matching lines @@
 
 /// A [ServiceEvent] is an asynchronous event notification from the vm.
 class ServiceEvent extends ServiceObject {
   /// The possible 'kind' values.
   static const kVMUpdate               = 'VMUpdate';
   static const kIsolateStart           = 'IsolateStart';
   static const kIsolateRunnable        = 'IsolateRunnable';
   static const kIsolateExit            = 'IsolateExit';
   static const kIsolateUpdate          = 'IsolateUpdate';
   static const kIsolateReload          = 'IsolateReload';
+  static const kIsolateSpawn           = 'IsolateSpawn';
   static const kServiceExtensionAdded  = 'ServiceExtensionAdded';
   static const kPauseStart             = 'PauseStart';
   static const kPauseExit              = 'PauseExit';
   static const kPauseBreakpoint        = 'PauseBreakpoint';
   static const kPauseInterrupted       = 'PauseInterrupted';
   static const kPauseException         = 'PauseException';
   static const kNone                   = 'None';
   static const kResume                 = 'Resume';
   static const kBreakpointAdded        = 'BreakpointAdded';
   static const kBreakpointResolved     = 'BreakpointResolved';
@@ skipping 23 matching lines @@
   @observable ServiceObject inspectee;
   @observable ByteData data;
   @observable int count;
   @observable String reason;
   @observable String exceptions;
   @observable String bytesAsString;
   @observable Map logRecord;
   @observable String extensionKind;
   @observable Map extensionData;
   @observable List timelineEvents;
+  @observable String spawnToken;
+  @observable String spawnError;
 
   int chunkIndex, chunkCount, nodeCount;
 
   @observable bool get isPauseEvent {
     return (kind == kPauseStart ||
             kind == kPauseExit ||
             kind == kPauseBreakpoint ||
             kind == kPauseInterrupted ||
             kind == kPauseException ||
             kind == kNone);
@@ skipping 62 matching lines @@
           new DateTime.fromMillisecondsSinceEpoch(logRecord['time']);
       logRecord['level'] = _findLogLevel(logRecord['level']);
     }
     if (map['extensionKind'] != null) {
       extensionKind = map['extensionKind'];
       extensionData = map['extensionData'];
     }
     if (map['timelineEvents'] != null) {
       timelineEvents = map['timelineEvents'];
     }
+    if (map['spawnToken'] != null) {
+      spawnToken = map['spawnToken'];
+    }
+    if (map['spawnError'] != null) {
+      spawnError = map['spawnError'];
+    }
   }
 
   String toString() {
     var ownerName = owner.id != null ? owner.id.toString() : owner.name;
     if (data == null) {
       return "ServiceEvent(owner='${ownerName}', kind='${kind}', "
           "time=${timestamp})";
     } else {
       return "ServiceEvent(owner='${ownerName}', kind='${kind}', "
           "data.lengthInBytes=${data.lengthInBytes}, time=${timestamp})";
@@ skipping 2091 matching lines @@
     var v = list[i];
     if ((v is ObservableMap) && _isServiceMap(v)) {
       list[i] = owner.getFromMap(v);
     } else if (v is ObservableList) {
       _upgradeObservableList(v, owner);
     } else if (v is ObservableMap) {
       _upgradeObservableMap(v, owner);
     }
   }
 }