Add a VM page to the observatory.

tests/standalone/vmservice/test_helper.dart

 // 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.
 
 library vmservice_test_helper;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'package:expect/expect.dart';
@@ skipping 68 matching lines @@
     try {
       replyAsString = UTF8.decode(data);
     } catch (e) {
       onRequestFailed(e);
       return null;
     }
     print('** Response: $replyAsString');
     var reply;
     try {
       reply = JSON.decode(replyAsString);
-    } catch (e) {
+    } catch (e, trace) {
       onRequestFailed(e);
       return null;
     }
     if (reply is! Map) {
       onRequestFailed('Reply was not a map: $reply');
       return null;
     }
     if (reply['type'] == null) {
       onRequestFailed('Reply does not contain a type key: $reply');
       return null;
@@ skipping 67 matching lines @@
       return completer.future;
     });
   }
 
   void requestExit() {
     print('** Requesting script to exit.');
     process.stdin.add([32, 13, 10]);
   }
 }
 
-class IsolateListTester {
-  final Map isolateList;
+class VMTester {
+  final Map vm;
 
-  IsolateListTester(this.isolateList) {
-    // The reply is an IsolateList.
-    Expect.equals('IsolateList', isolateList['type'], 'Not an IsolateList.');
+  VMTester(this.vm) {
+    // The reply is a VM.
+    Expect.equals('VM', vm['type'], 'Not an VM.');
   }
 
   void checkIsolateCount(int n) {
-    Expect.equals(n, isolateList['members'].length, 'Isolate count not $n');
+    Expect.equals(n, vm['isolates'].length, 'Isolate count not $n');
   }
 
   void checkIsolateIdExists(String id) {
     var exists = false;
-    isolateList['members'].forEach((isolate) {
+    vm['isolates'].forEach((isolate) {
       if (isolate['id'] == id) {
         exists = true;
       }
     });
     Expect.isTrue(exists, 'No isolate with id: $id');
   }
 
   String getIsolateId(int index) {
-    return isolateList['members'][index]['id'];
+    return vm['isolates'][index]['id'];
   }
 }
 
 class ClassTableHelper {
   final Map classTable;
 
   ClassTableHelper(this.classTable) {
     Expect.equals('ClassList', classTable['type'], 'Not a ClassTable.');
   }
 
@@ skipping 55 matching lines @@
       });
     });
     return Future.wait(requests).then((a) {
       a.forEach((FieldRequestHelper field) {
         fields[field.field['user_name']] = field.field;
       });
       return this;
     });
   }
 }