views: Add a cross-platform SelectFileDialogExtension API.

chrome/browser/ui/select_file_dialog_extension.h

+// 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.
+
+#ifndef CHROME_BROWSER_UI_SELECT_FILE_DIALOG_EXTENSION_H_
+#define CHROME_BROWSER_UI_SELECT_FILE_DIALOG_EXTENSION_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+
+namespace ui {
+struct SelectedFileInfo;
+}
+
+class SelectFileDialogExtension {
+ public:
+  // Routes callback to appropriate SelectFileDialog::Listener based on
+  // the owning |tab_id|.
+  static void OnFileSelected(int32 tab_id,
+                             const ui::SelectedFileInfo& file,
+                             int index);
+
+  static void OnMultiFilesSelected(
+      int32 tab_id,
+      const std::vector<ui::SelectedFileInfo>& files);
+
+  static void OnFileSelectionCanceled(int32 tab_id);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(SelectFileDialogExtension);
+};
+
+#endif  // CHROME_BROWSER_UI_SELECT_FILE_DIALOG_EXTENSION_H_