Rewrite dialog API with our simpler blocking dialog implementations.

Fixed #9, fixed #10.

browser/file_dialog.h

@@ -0,0 +1,38 @@
+// Copyright (c) 2013 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.
+
+#ifndef BROWSER_FILE_DIALOG_H_
+#define BROWSER_FILE_DIALOG_H_
+
+#include <string>
+#include <vector>
+
+#include "base/files/file_path.h"
+
+namespace atom {
+class NativeWindow;
+}
+
+namespace file_dialog {
+
+enum FileDialogProperty {
+  FILE_DIALOG_OPEN_FILE        = 1,
+  FILE_DIALOG_OPEN_DIRECTORY   = 2,
+  FILE_DIALOG_MULTI_SELECTIONS = 4,
+  FILE_DIALOG_CREATE_DIRECTORY = 8,
+};
+
+bool ShowOpenDialog(const std::string& title,
+                    const base::FilePath& default_path,
+                    int properties,
+                    std::vector<base::FilePath>* paths);
+
+bool ShowSaveDialog(atom::NativeWindow* window,
+                    const std::string& title,
+                    const base::FilePath& default_path,
+                    base::FilePath* path);
+
+}  // namespace file_dialog
+
+#endif  // BROWSER_FILE_DIALOG_H_