[gtk] re-acquire input grab on bubbles when another widget

chrome/browser/ui/gtk/website_settings/permission_selector_observer.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_UI_GTK_WEBSITE_SETTINGS_PERMISSION_SELECTOR_OBSERVER_H_
 #define CHROME_BROWSER_UI_GTK_WEBSITE_SETTINGS_PERMISSION_SELECTOR_OBSERVER_H_
 
 class PermissionSelector;
 
 class PermissionSelectorObserver {
  public:
   // This method is called when a permission setting is changed by a
   // |selector|.
   virtual void OnPermissionChanged(PermissionSelector* selector) = 0;
 
-  // GtkComboBox grabs the keyboard and pointer when it displays its popup,
-  // which steals the grabs that BubbleGtk had installed. When the combobox
-  // popup is hidden, we notify BubbleGtk so it can try to reacquire the grabs
-  // (otherwise, GTK won't activate our widgets when the user clicks in them).
-  // OnComboboxShown is called when a combobox popup is closed.
-  virtual void OnComboboxShown() = 0;
-
  protected:
   virtual ~PermissionSelectorObserver() {}
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_WEBSITE_SETTINGS_PERMISSION_SELECTOR_OBSERVER_H_