Clean up and simplify how we deal with filename extensions on Windows. Allow...

chrome/browser/shell_dialogs.h

 // Copyright (c) 2006-2008 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_SHELL_DIALOGS_H_
 #define CHROME_BROWSER_SHELL_DIALOGS_H_
 
 #include <string>
 #include <vector>
 
 #include "base/file_path.h"
 #include "base/ref_counted.h"
 #include "base/string16.h"
 #include "gfx/native_widget_types.h"
 
 namespace gfx {
 class Font;
 }
 
+// This function is declared extern such that it is accessible for unit tests
+// in /chrome/browser/views/shell_dialogs_win_unittest.cc
+extern std::wstring AppendExtensionIfNeeded(const std::wstring& filename,
+                                            const std::wstring& filter_selected,
+                                            const std::wstring& suggested_ext);
+
 // A base class for shell dialogs.
 class BaseShellDialog {
  public:
   // Returns true if a shell dialog box is currently being shown modally
   // to the specified owner.
   virtual bool IsRunning(gfx::NativeWindow owning_window) const = 0;
 
   // Notifies the dialog box that the listener has been destroyed and it should
   // no longer be sent notifications.
   virtual void ListenerDestroyed() = 0;
@@ skipping 143 matching lines @@
                           const std::wstring& font_name,
                           int font_size) = 0;
 
  protected:
   friend class base::RefCountedThreadSafe<SelectFontDialog>;
 
   virtual ~SelectFontDialog() {}
 };
 
 #endif  // CHROME_BROWSER_SHELL_DIALOGS_H_