Really fix build after r193020.

chrome/browser/devtools/devtools_file_helper.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/devtools/devtools_file_helper.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 59 matching lines @@
   }
 
   void Show(ui::SelectFileDialog::Type type,
             const base::FilePath& default_path) {
     AddRef();  // Balanced in the three listener outcomes.
     select_file_dialog_->SelectFile(type,
                                     string16(),
                                     default_path,
                                     NULL,
                                     0,
-                                    FILE_PATH_LITERAL(std::string()),
+                                    base::FilePath::StringType(),
                                     NULL,
                                     NULL);
   }
 
   // ui::SelectFileDialog::Listener implementation.
   virtual void FileSelected(const base::FilePath& path,
                             int index,
                             void* params) OVERRIDE {
     selected_callback_.Run(path);
     Release();  // Balanced in ::Show.
@@ skipping 304 matching lines @@
 void DevToolsFileHelper::RemoveFileSystem(const std::string& file_system_path) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   base::FilePath path = base::FilePath::FromUTF8Unsafe(file_system_path);
   isolated_context()->RevokeFileSystemByPath(path);
 
   DictionaryPrefUpdate update(profile_->GetPrefs(),
                               prefs::kDevToolsFileSystemPaths);
   DictionaryValue* file_systems_paths_value = update.Get();
   file_systems_paths_value->RemoveWithoutPathExpansion(file_system_path, NULL);
 }