Implement a policy to autologin a public account.

content/public/browser/notification_watcher.h

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_PUBLIC_BROWSER_NOTIFICATION_WATCHER_H_
+#define CONTENT_PUBLIC_BROWSER_NOTIFICATION_WATCHER_H_
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "base/compiler_specific.h"
+#include "base/run_loop.h"
+#include "content/common/content_export.h"
+#include "content/public/browser/notification_observer.h"
+
+namespace content {
+
+class NotificationDetails;
+class NotificationSource;
+
+// Observes a specific notification type and quits the message loop once a
+// condition holds.
+class CONTENT_EXPORT NotificationWatcher

[Mattias Nissler (ping if slow), 2013/03/01 10:37:21]

There's already WindowedNotificationObserver in
content/public/test/test_utils.h, which does essentially the same thing. I
wasn't aware of that when I wrote device_local_account_browsertest.cc, but I
think it makes sense to reconcile these instead of having the same thing twice
now that you need this code for your test as well.

You probably want to check with the author of WindowedNotificationObserver.

[dconnelly, 2013/03/06 10:02:59]

Done.

+    : public content::NotificationObserver {
+ public:
+  // Callback invoked on notifications. Should return true when the condition
+  // that the caller is waiting for is satisfied.
+  typedef base::Callback<bool(void)> ConditionTestCallback;
+
+  explicit NotificationWatcher(int notification_type,
+                               const ConditionTestCallback& callback);
+
+  void Run();
+
+  // content::NotificationObserver:
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+ private:
+  int type_;
+  ConditionTestCallback callback_;
+  base::RunLoop run_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(NotificationWatcher);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_NOTIFICATION_WATCHER_H_