Use a direct include of strings headers in chrome/browser/ui/b*-p*/.

chrome/browser/ui/chrome_select_file_policy_unittest.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/ui/chrome_select_file_policy.h"
 
 #include "base/files/file_path.h"
 #include "base/message_loop.h"
 #include "base/prefs/pref_service.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prefs/browser_prefs.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/scoped_testing_local_state.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/shell_dialogs/select_file_dialog.h"
@@ skipping 74 matching lines @@
       TestingBrowserProcess::GetGlobal());
 
   scoped_ptr<FileSelectionUser> file_selection_user(new FileSelectionUser());
 
   // Disallow file-selection dialogs.
   local_state.Get()->SetManagedPref(prefs::kAllowFileSelectionDialogs,
                                     new base::FundamentalValue(false));
 
   file_selection_user->StartFileSelection();
 }