gtk: Add dummy implementation of dialog.

atom.gyp

@@ -119,6 +119,7 @@
       'browser/ui/cocoa/nsalert_synchronous_sheet.h',
       'browser/ui/cocoa/nsalert_synchronous_sheet.mm',
       'browser/ui/file_dialog.h',
+      'browser/ui/file_dialog_gtk.cc',
       'browser/ui/file_dialog_mac.mm',
       'browser/ui/file_dialog_win.cc',
       'browser/ui/gtk/gtk_custom_menu.cc',
@@ -128,6 +129,7 @@
       'browser/ui/gtk/gtk_window_util.cc',
       'browser/ui/gtk/gtk_window_util.h',
       'browser/ui/message_box.h',
+      'browser/ui/message_box_gtk.cc',
       'browser/ui/message_box_mac.mm',
       'browser/ui/message_box_win.cc',
       'browser/ui/win/menu_2.cc',

browser/ui/file_dialog_gtk.cc

@@ -0,0 +1,41 @@
+// Copyright (c) 2014 GitHub, Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "browser/ui/file_dialog.h"
+
+#include "base/callback.h"
+
+namespace file_dialog {
+
+bool ShowOpenDialog(atom::NativeWindow* parent_window,
+                    const std::string& title,
+                    const base::FilePath& default_path,
+                    int properties,
+                    std::vector<base::FilePath>* paths) {
+  return false;
+}
+
+void ShowOpenDialog(atom::NativeWindow* parent_window,
+                    const std::string& title,
+                    const base::FilePath& default_path,
+                    int properties,
+                    const OpenDialogCallback& callback) {
+  callback.Run(false, std::vector<base::FilePath>());
+}
+
+bool ShowSaveDialog(atom::NativeWindow* parent_window,
+                    const std::string& title,
+                    const base::FilePath& default_path,
+                    base::FilePath* path) {
+  return false;
+}
+
+void ShowSaveDialog(atom::NativeWindow* parent_window,
+                    const std::string& title,
+                    const base::FilePath& default_path,
+                    const SaveDialogCallback& callback) {
+  callback.Run(false, base::FilePath());
+}
+
+}  // namespace file_dialog

browser/ui/message_box_gtk.cc

@@ -0,0 +1,30 @@
+// Copyright (c) 2014 GitHub, Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "browser/ui/message_box.h"
+
+#include "base/callback.h"
+
+namespace atom {
+
+int ShowMessageBox(NativeWindow* parent_window,
+                   MessageBoxType type,
+                   const std::vector<std::string>& buttons,
+                   const std::string& title,
+                   const std::string& message,
+                   const std::string& detail) {
+  return 0;
+}
+
+void ShowMessageBox(NativeWindow* parent_window,
+                    MessageBoxType type,
+                    const std::vector<std::string>& buttons,
+                    const std::string& title,
+                    const std::string& message,
+                    const std::string& detail,
+                    const MessageBoxCallback& callback) {
+  callback.Run(0);
+}
+
+}  // namespace atom