Add additional Schedule heartbeat calls.

sdk/lib/_internal/pub/lib/src/http.dart

 // Copyright (c) 2012, 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.
 
 /// Helpers for dealing with HTTP.
 library pub.http;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:json' as json;
@@ skipping 116 matching lines @@
   /// Logs the fact that [response] was received, and information about it.
   void _logResponse(http.StreamedResponse response) {
     // TODO(nweiz): Fork the response stream and log the response body. Be
     // careful not to log OAuth2 private data, though.
 
     var responseLog = new StringBuffer();
     var request = response.request;
     var stopwatch = _requestStopwatches.remove(request)..stop();
     responseLog.writeln("HTTP response ${response.statusCode} "
         "${response.reasonPhrase} for ${request.method} ${request.url}");
-    responseLog.write("took ${stopwatch.elapsed}");
+    responseLog.writeln("took ${stopwatch.elapsed}");
     response.headers.forEach((name, value) =>
         responseLog.writeln(_logField(name, value)));
 
     log.fine(responseLog.toString().trim());
   }
 
   /// Returns a log-formatted string for the HTTP field or header with the given
   /// [name] and [value].
   String _logField(String name, String value) {
     if (_CENSORED_FIELDS.contains(name.toLowerCase())) {
@@ skipping 57 matching lines @@
 
 /// Exception thrown when an HTTP operation fails.
 class PubHttpException implements Exception {
   final http.Response response;
 
   const PubHttpException(this.response);
 
   String toString() => 'HTTP error ${response.statusCode}: '
       '${response.reasonPhrase}';
 }