Add an extra argument to the DisplayBalloon method to support custom notification icons.

chrome/browser/ui/views/status_icons/status_tray_win.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_UI_VIEWS_STATUS_ICONS_STATUS_TRAY_WIN_H_
 #define CHROME_BROWSER_UI_VIEWS_STATUS_ICONS_STATUS_TRAY_WIN_H_
 #pragma once
 
 #include <windows.h>
 
+#include "base/compiler_specific.h"
 #include "chrome/browser/status_icons/status_tray.h"
 
 class StatusTrayWin : public StatusTray {
  public:
   StatusTrayWin();
   ~StatusTrayWin();
 
   // Exposed for testing.
   LRESULT CALLBACK WndProc(HWND hwnd,
                            UINT message,
                            WPARAM wparam,
                            LPARAM lparam);
  protected:
   // Overriden from StatusTray:
-  virtual StatusIcon* CreatePlatformStatusIcon();
+  virtual StatusIcon* CreatePlatformStatusIcon() OVERRIDE;
 
  private:
   // Static callback invoked when a message comes in to our messaging window.
   static LRESULT CALLBACK WndProcStatic(HWND hwnd,
                                         UINT message,
                                         WPARAM wparam,
                                         LPARAM lparam);
 
   // The unique icon ID we will assign to the next icon.
   UINT next_icon_id_;
 
   // The window used for processing events.
   HWND window_;
 
   // The message ID of the "TaskbarCreated" message, sent to us when we need to
   // reset our status icons.
   UINT taskbar_created_message_;
 
   DISALLOW_COPY_AND_ASSIGN(StatusTrayWin);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_STATUS_ICONS_STATUS_TRAY_WIN_H_