Substantially increase browser timeouts.

lib/src/runner/browser/server.dart

 // Copyright (c) 2015, 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 test.runner.browser.server;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
@@ skipping 428 matching lines @@
     // tests complete.
     browser.onExit.then((_) {
       if (completer.isCompleted) return;
       if (!_closed) return;
       completer.complete(null);
     }).catchError((error, stackTrace) {
       if (completer.isCompleted) return;
       completer.completeError(error, stackTrace);
     });
 
-    return completer.future.timeout(new Duration(seconds: 7), onTimeout: () {
+    return completer.future.timeout(new Duration(seconds: 30), onTimeout: () {
       throw new ApplicationException(
           "Timed out waiting for ${platform.name} to connect.");
     });
   }
 
   /// Starts the browser identified by [browser] and has it load [url].
   Browser _newBrowser(Uri url, TestPlatform browser) {
     switch (browser) {
       case TestPlatform.dartium: return new Dartium(url);
       case TestPlatform.contentShell: return new ContentShell(url);
@@ skipping 21 matching lines @@
       await Future.wait(futures);
 
       if (_pubServeUrl == null) {
         new Directory(_compiledDir).deleteSync(recursive: true);
       } else {
         _http.close();
       }
     });
   }
 }