Implement notifications for the DisplayBalloon method on Linux and Mac.

chrome/browser/status_icons/desktop_notification_balloon_impl.h

+// Copyright (c) 2011 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 CHROME_BROWSER_STATUS_ICONS_DESKTOP_NOTIFICATION_BALLOON_IMPL_H_
+#define CHROME_BROWSER_STATUS_ICONS_DESKTOP_NOTIFICATION_BALLOON_IMPL_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/string16.h"
+#include "chrome/browser/status_icons/status_icon.h"
+
+class Notification;
+class SkBitmap;
+
+// Provides the notification balloon functionality by using desktop
+// notifications to platforms that don't have a specific native API.
+class DesktopNotificationBalloonImpl : public StatusIcon {

[Andrew T Wilson (Slow), 2011/10/26 01:21:18]

Can this be a separate helper class? Not sure this should be a derived class
from StatusIcon.

[Leandro Graciá Gil, 2011/10/26 13:52:00]

Done.

+ public:
+  DesktopNotificationBalloonImpl();
+  virtual ~DesktopNotificationBalloonImpl();
+
+  virtual void DisplayBalloon(const SkBitmap& icon,

[Andrew T Wilson (Slow), 2011/10/26 01:21:18]

Not sure that the current implementation of this routine is correct - the
existing windows implementation closes the balloon after a few seconds, but this
implementation leaves the window on the screen forever?

[Leandro Graciá Gil, 2011/10/26 13:52:00]

It leaves the notification in the screen until the user closes it manually
(there's a close button on it). However, implementing a timeout is very easy for
this case and I it can be done if you think it will be better. I decided to
leave it open to make sure the user was fully aware of it, otherwise it might be
a problem depending on the length of the notification contents.


On 2011/10/26 01:21:18, Andrew T Wilson wrote:

+                              const string16& title,
+                              const string16& contents) OVERRIDE;
+
+ private:
+  // Notification balloon.
+  scoped_ptr<Notification> notification_;
+
+  // Counter to provide unique ids to notifications.
+  static int id_count_;
+
+  DISALLOW_COPY_AND_ASSIGN(DesktopNotificationBalloonImpl);
+};
+
+#endif  // CHROME_BROWSER_STATUS_ICONS_DESKTOP_NOTIFICATION_BALLOON_IMPL_H_