Delete the GTK+ port of Chrome.

ui/base/gtk/focus_store_gtk.cc

-// 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.
-
-#include "ui/base/gtk/focus_store_gtk.h"
-
-#include <gtk/gtk.h>
-
-namespace ui {
-
-FocusStoreGtk::FocusStoreGtk()
-    : widget_(NULL),
-      destroy_handler_id_(0) {
-}
-
-FocusStoreGtk::~FocusStoreGtk() {
-  DisconnectDestroyHandler();
-}
-
-void FocusStoreGtk::Store(GtkWidget* widget) {
-  GtkWidget* focus_widget = NULL;
-  if (widget) {
-    // A detached widget won't have a toplevel window as an ancestor, so we
-    // can't assume that the query for toplevel will return a window.
-    GtkWidget* toplevel = gtk_widget_get_ancestor(widget, GTK_TYPE_WINDOW);
-    GtkWindow* window = GTK_IS_WINDOW(toplevel) ? GTK_WINDOW(toplevel) : NULL;
-    if (window)
-      focus_widget = gtk_window_get_focus(window);
-  }
-
-  SetWidget(focus_widget);
-}
-
-void FocusStoreGtk::SetWidget(GtkWidget* widget) {
-  DisconnectDestroyHandler();
-
-  // We don't add a ref. The signal handler below effectively gives us a weak
-  // reference.
-  widget_ = widget;
-  if (widget_) {
-    // When invoked, |gtk_widget_destroyed| will set |widget_| to NULL.
-    destroy_handler_id_ = g_signal_connect(widget_, "destroy",
-                                           G_CALLBACK(gtk_widget_destroyed),
-                                           &widget_);
-  }
-}
-
-void FocusStoreGtk::DisconnectDestroyHandler() {
-  if (widget_) {
-    g_signal_handler_disconnect(widget_, destroy_handler_id_);
-    widget_ = NULL;
-  }
-}
-
-}  // namespace ui