Really fix build after r193020.

chrome/browser/extensions/api/developer_private/entry_picker.cc

 // 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.
 
 #include "chrome/browser/extensions/api/developer_private/entry_picker.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/string_util.h"
@@ skipping 46 matching lines @@
               base::Unretained(this), static_cast<void*>(NULL)));
     }
     return;
   }
 
   select_file_dialog_->SelectFile(picker_type,
                                   select_title,
                                   last_directory,
                                   &info,
                                   file_type_index,
-                                  FILE_PATH_LITERAL(std::string()),
+                                  base::FilePath::StringType(),
                                   owning_window,
                                   NULL);
 }
 
 EntryPicker::~EntryPicker() {}
 
 void EntryPicker::FileSelected(const base::FilePath& path,
                                int index,
                                void* params) {
   client_->FileSelected(path);
@@ skipping 19 matching lines @@
 }
 
 // static
 void EntryPicker::StopSkippingPickerForTest() {
   g_skip_picker_for_test = false;
 }
 
 }  // namespace api
 
 }  // namespace extensions