GTK: Move code shared by future content/ classes and chrome/ to ui/.

ui/base/gtk/focus_store_gtk.h

 // Copyright (c) 2011 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_FOCUS_STORE_GTK_H_
-#define CHROME_BROWSER_UI_GTK_FOCUS_STORE_GTK_H_
+#ifndef UI_BASE_GTK_FOCUS_STORE_GTK_H_
+#define UI_BASE_GTK_FOCUS_STORE_GTK_H_
 #pragma once
 
 #include "base/basictypes.h"
+#include "ui/base/ui_export.h"
 
 typedef struct _GtkWidget GtkWidget;
 
-class FocusStoreGtk {
+namespace ui {
+
+class UI_EXPORT FocusStoreGtk {
  public:
   FocusStoreGtk();
-
-  virtual ~FocusStoreGtk();
+  ~FocusStoreGtk();
 
   GtkWidget* widget() const { return widget_; }
 
   // Save the widget that is currently focused for |widget|'s toplevel (NOT
   // |widget|).
   void Store(GtkWidget* widget);
 
   // Save |widget| as the focus widget. Call with NULL to clear |widget_|.
   void SetWidget(GtkWidget* widget);
 
  private:
   // Disconnect the previous destroy handler (if any).
   void DisconnectDestroyHandler();
 
   // The widget which last had focus.
   GtkWidget* widget_;
 
   // The widget for which we've stored focus might be destroyed by the time we
   // want to restore focus. Thus we connect to the "destroy" signal on that
   // widget. This is the ID for the destroy handler.
   unsigned int destroy_handler_id_;
 
   DISALLOW_COPY_AND_ASSIGN(FocusStoreGtk);
 };
 
-#endif  // CHROME_BROWSER_UI_GTK_FOCUS_STORE_GTK_H_
+}  // namespace ui
+
+#endif  // UI_BASE_GTK_FOCUS_STORE_GTK_H_