Add Google Charts to Observatory and use it in allocation profiler

runtime/bin/vmservice/client/lib/src/observatory/request_manager.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.
 
 part of observatory;
 
 /// A request response interceptor is called for each response.
 typedef void RequestResponseInterceptor();
 
 abstract class RequestManager extends Observable {
@@ skipping 38 matching lines @@
   }
 
   void setResponseRequestError(HttpRequest request) {
     String error = '${request.status} ${request.statusText}';
     if (request.status == 0) {
       error = 'No service found. Did you run with --enable-vm-service ?';
     }
     setResponses([{
       'type': 'Error',
       'errorType': 'RequestError',
-      'error': error
+      'text': error
     }]);
   }
 
   void setResponseError(String message) {
     setResponses([{
       'type': 'Error',
       'errorType': 'ResponseError',
       'text': message
     }]);
     Logger.root.severe(message);
@@ skipping 128 matching lines @@
       assert(response['type'] == 'Script');
       var script = new Script.fromMap(response);
       Logger.root.info(
           'Added script ${script.scriptRef['name']} to isolate.');
       _setModelResponse('Script', 'script', script);
       isolate.scripts[url] = script;
     });
   }
 
   void _requestCatchError(e, st) {
-    if (e is HttpRequest) {
+    if (e is ProgressEvent) {
       setResponseRequestError(e.target);
     } else {
       setResponseError('$e $st');
     }
   }
 
   /// Request [request] from the VM service. Updates [responses].
   /// Will trigger [interceptor] if one is set.
   void get(String requestString) {
     if (isCodeRequest(requestString)) {
@@ skipping 64 matching lines @@
     message['query'] = requestString;
     _requestSerial++;
 
     var completer = new Completer();
     _outstandingRequests[idString] = completer;
 
     window.parent.postMessage(JSON.encode(message), '*');
     return completer.future;
   }
 }