Reland r265807: "Moves the notification icon out of th..."

chrome/browser/status_icons/status_icon.h

 // Copyright (c) 2012 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/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
@@ skipping 42 matching lines @@
 
   // Returns true if there are registered click observers.
   bool HasObservers() const;
 
   // Dispatches a click event to the observers.
   void DispatchClickEvent();
 #if defined(OS_WIN)
   void DispatchBalloonClickEvent();
 #endif
 
+  // Attempts to make the status icon directly visible on system UI.  Currently
+  // this only applies to Windows, where status icons are hidden by default
+  // inside an overflow window.
+  // WARNING: This currently uses undocumented Windows APIs and spawns a worker
+  // thread to do it.  Use sparingly.
+  virtual void ForceVisible();
+
  protected:
   // Invoked after a call to SetContextMenu() to let the platform-specific
   // subclass update the native context menu based on the new model. If NULL is
   // passed, subclass should destroy the native context menu.
   virtual void UpdatePlatformContextMenu(StatusIconMenuModel* model) = 0;
 
  private:
   ObserverList<StatusIconObserver> observers_;
 
   // Context menu, if any.
   scoped_ptr<StatusIconMenuModel> context_menu_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(StatusIcon);
 };
 
 #endif  // CHROME_BROWSER_STATUS_ICONS_STATUS_ICON_H_