Revert of Move JoinString to the base namespace

chrome/browser/ui/autofill/data_model_wrapper.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/autofill/data_model_wrapper.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 61 matching lines @@
 
   // Email and phone number aren't part of address formatting.
   base::string16 non_address_info;
   base::string16 email = GetInfoForDisplay(AutofillType(EMAIL_ADDRESS));
   if (!email.empty())
     non_address_info += base::ASCIIToUTF16("\n") + email;
 
   non_address_info += base::ASCIIToUTF16("\n") + phone;
 
   *vertically_compact = base::UTF8ToUTF16(single_line) + non_address_info;
-  *horizontally_compact = base::UTF8ToUTF16(base::JoinString(lines, "\n")) +
+  *horizontally_compact = base::UTF8ToUTF16(JoinString(lines, "\n")) +
       non_address_info;
 
   return true;
 }
 
 bool DataModelWrapper::FillFormStructure(
     const std::vector<ServerFieldType>& types,
     const FormStructure::InputFieldComparator& compare,
     FormStructure* form_structure) const {
   return form_structure->FillFields(
@@ skipping 282 matching lines @@
   }
 
   return base::UTF8ToUTF16(address_->GetFieldValue(field));
 }
 
 const std::string& I18nAddressDataWrapper::GetLanguageCode() const {
   return address_->language_code;
 }
 
 }  // namespace autofill