Move SelectFileDialog implementation to ui/base/dialogs/

chrome/browser/ui/views/select_file_dialog_win_unittest.cc

Index: chrome/browser/ui/views/select_file_dialog_win_unittest.cc
diff --git a/chrome/browser/ui/views/select_file_dialog_win_unittest.cc b/chrome/browser/ui/views/select_file_dialog_win_unittest.cc
index ad86e7a76db5655918c613d7197c7cddd5e23bf0..41dd5bd836ad830fd201b6b5458bc5bd203a7267 100644
--- a/chrome/browser/ui/views/select_file_dialog_win_unittest.cc
+++ b/chrome/browser/ui/views/select_file_dialog_win_unittest.cc
@@ -5,6 +5,12 @@
 #include "chrome/browser/ui/select_file_dialog.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+// This function is declared extern such that it is accessible for unit tests
+// in /chrome/browser/ui/views/select_file_dialog_win_unittest.cc
+extern std::wstring AppendExtensionIfNeeded(const std::wstring& filename,
+                                            const std::wstring& filter_selected,
+                                            const std::wstring& suggested_ext);
+
 TEST(ShellDialogsWin, AppendExtensionIfNeeded) {
   struct AppendExtensionTestCase {
     wchar_t* filename;