content: Move gtk_floating_container to ui/base/gtk/.

ui/base/gtk/gtk_floating_container.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_GTK_FLOATING_CONTAINER_H_
-#define CHROME_BROWSER_UI_GTK_GTK_FLOATING_CONTAINER_H_
+#ifndef UI_BASE_GTK_GTK_FLOATING_CONTAINER_H_
+#define UI_BASE_GTK_GTK_FLOATING_CONTAINER_H_
 #pragma once
 
 #include <gdk/gdk.h>
 #include <gtk/gtk.h>
 
+#include "ui/base/ui_export.h"
+
 // A specialized container, which is a cross between a GtkBin and a
 // GtkFixed. This container dervies from GtkBin and the implementation of
 // gtk_container_add() is the same: only one GtkWidget can be added through
 // that interface. The GtkBin portion contains normal content and is given the
 // same allocation that this container has.
 //
 // In addition, any number of widgets can be added through the
 // gtk_floating_container_add_floating() method, which provides functionality
 // similar to a GtkFixed. Unlike a GtkFixed, coordinates are not set when you
 // gtk_fixed_put(). The location of the floating widgets is determined while
@@ skipping 46 matching lines @@
   GtkBinClass parent_class;
 };
 
 // Internal structure used to associate a widget and its x/y child properties.
 struct _GtkFloatingContainerChild {
   GtkWidget* widget;
   gint x;
   gint y;
 };
 
-GType      gtk_floating_container_get_type() G_GNUC_CONST;
-GtkWidget* gtk_floating_container_new();
-void       gtk_floating_container_add_floating(GtkFloatingContainer* container,
-                                               GtkWidget* widget);
+UI_EXPORT GType      gtk_floating_container_get_type() G_GNUC_CONST;
+UI_EXPORT GtkWidget* gtk_floating_container_new();
+UI_EXPORT void       gtk_floating_container_add_floating(
+    GtkFloatingContainer* container,
+    GtkWidget* widget);
 // Use gtk_container_remove to remove all widgets; both widgets added with
 // gtk_container_add() and gtk_floating_container_add_floating().
 
 G_END_DECLS
 
-#endif  // CHROME_BROWSER_UI_GTK_GTK_FLOATING_CONTAINER_H_
+#endif  // UI_BASE_GTK_GTK_FLOATING_CONTAINER_H_