Implement notifications for the DisplayBalloon method on Linux and Mac.

chrome/browser/status_icons/desktop_notification_balloon.h

Index: chrome/browser/status_icons/desktop_notification_balloon.h
diff --git a/chrome/browser/status_icons/desktop_notification_balloon.h b/chrome/browser/status_icons/desktop_notification_balloon.h
new file mode 100644
index 0000000000000000000000000000000000000000..2a44f2b9cb75222644878a1858ed3d63d11b3dee
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+++ b/chrome/browser/status_icons/desktop_notification_balloon.h
@@ -0,0 +1,37 @@
+// 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_H_
+#define CHROME_BROWSER_STATUS_ICONS_DESKTOP_NOTIFICATION_BALLOON_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/string16.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 DesktopNotificationBalloon {
+ public:
+  DesktopNotificationBalloon();
+  virtual ~DesktopNotificationBalloon();
+
+  void DisplayBalloon(const SkBitmap& icon,
+                      const string16& title,
+                      const string16& contents);
+
+ private:
+  // Notification balloon.
+  scoped_ptr<Notification> notification_;
+
+  // Counter to provide unique ids to notifications.
+  static int id_count_;
+
+  DISALLOW_COPY_AND_ASSIGN(DesktopNotificationBalloon);
+};
+
+#endif  // CHROME_BROWSER_STATUS_ICONS_DESKTOP_NOTIFICATION_BALLOON_H_