Initial implementation of status tray functionality (mac-only, currently).

chrome/browser/status_icons/status_icon.h

+// Copyright (c) 2010 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_STATUS_ICON_H_
+#define CHROME_BROWSER_STATUS_ICONS_STATUS_ICON_H_
+
+#include "base/string16.h"
+
+class SkBitmap;
+
+class StatusIcon {
+ public:
+  // Creates a new StatusIcon.
+  static StatusIcon* Create();
+
+  virtual ~StatusIcon() {}
+
+  // Sets the image associated with this status icon.
+  virtual void SetImage(const SkBitmap& image) = 0;
+
+  // Sets the hover text for this status icon.
+  virtual void SetToolTip(const string16& tool_tip) = 0;
+
+  class StatusIconObserver {
+   public:
+    virtual ~StatusIconObserver() {}
+
+    // Called when the user clicks on the system tray icon.
+    virtual void OnClicked() = 0;
+  };
+
+  // Adds/removes a observer for status bar events.
+  virtual void AddObserver(StatusIcon::StatusIconObserver* observer) = 0;
+  virtual void RemoveObserver(StatusIcon::StatusIconObserver* observer) = 0;
+};
+
+
+#endif  // CHROME_BROWSER_STATUS_ICONS_STATUS_ICON_H_