(GTK only) Add icons to the "Permissions" tab of the Website Settings UI.

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_