Use current gtk dialogs in linux_aura.

chrome/browser/ui/libgtk2ui/gtk2_ui.cc

Index: chrome/browser/ui/libgtk2ui/gtk2_ui.cc
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_ui.cc b/chrome/browser/ui/libgtk2ui/gtk2_ui.cc
index 15cad58a7236ff86338cb83d328b7aacff1cf46a..874ccbb833e76fe072a113ca5f0c8342efb485a5 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_ui.cc
+++ b/chrome/browser/ui/libgtk2ui/gtk2_ui.cc
@@ -13,6 +13,7 @@
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/ui/libgtk2ui/chrome_gtk_frame.h"
 #include "chrome/browser/ui/libgtk2ui/gtk2_util.h"
+#include "chrome/browser/ui/libgtk2ui/select_file_dialog_impl.h"
 #include "chrome/browser/ui/libgtk2ui/skia_utils_gtk2.h"
 #include "grit/theme_resources.h"
 #include "grit/ui_resources.h"
@@ -330,6 +331,12 @@ bool Gtk2UI::GetColor(int id, SkColor* color) const {
   return false;
 }
 
+ui::SelectFileDialog* Gtk2UI::CreateSelectFileDialog(
+    ui::SelectFileDialog::Listener* listener,
+    ui::SelectFilePolicy* policy) const {
+  return SelectFileDialogImpl::Create(listener, policy);
+}
+
 void Gtk2UI::GetScrollbarColors(GdkColor* thumb_active_color,
                                 GdkColor* thumb_inactive_color,
                                 GdkColor* track_color) {