Use current gtk dialogs in linux_aura.

ui/base/dialogs/select_file_dialog.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/dialogs/select_file_dialog.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "build/build_config.h"
 #include "ui/base/dialogs/selected_file_info.h"
 #include "ui/base/dialogs/select_file_dialog_factory.h"
 #include "ui/base/dialogs/select_file_policy.h"
 #include "ui/base/l10n/l10n_util.h"
+#include "ui/base/linux_ui.h"
 
 #if defined(OS_WIN)
 #include "ui/base/dialogs/select_file_dialog_win.h"
 #elif defined(OS_MACOSX)
 #include "ui/base/dialogs/select_file_dialog_mac.h"
 #elif defined(TOOLKIT_GTK)
 #include "ui/base/dialogs/gtk/select_file_dialog_impl.h"
 #endif
 
 namespace {
@@ skipping 35 matching lines @@
 
 // static
 SelectFileDialog* SelectFileDialog::Create(Listener* listener,
                                            ui::SelectFilePolicy* policy) {
   if (dialog_factory_) {
     SelectFileDialog* dialog = dialog_factory_->Create(listener, policy);
     if (dialog)
       return dialog;
   }
 
-  // TODO(erg): Proxy to LinuxUI here.
+#if defined(USE_AURA) && !defined(USE_ASH) && defined(OS_LINUX)
+  const ui::LinuxUI* linux_ui = ui::LinuxUI::instance();
+  if (linux_ui)
+    return linux_ui->CreateSelectFileDialog(listener, policy);
+#endif
 
-  // TODO(erg): Add other OSs one by one here.
 #if defined(OS_WIN) && !defined(USE_AURA)
   // TODO(port): The windows people need this to work in aura, too.
   return CreateWinSelectFileDialog(listener, policy);
 #elif defined(OS_MACOSX) && !defined(USE_AURA)
   return CreateMacSelectFileDialog(listener, policy);
 #elif defined(TOOLKIT_GTK)
   return CreateLinuxSelectFileDialog(listener, policy);
 #elif defined(OS_ANDROID)
   // see crbug.com/116131 to track implemenation of SelectFileDialog
   NOTIMPLEMENTED();
@@ skipping 42 matching lines @@
 }
 
 SelectFileDialog::~SelectFileDialog() {}
 
 void SelectFileDialog::CancelFileSelection(void* params) {
   if (listener_)
     listener_->FileSelectionCanceled(params);
 }
 
 }  // namespace ui