Update some uses of char16 to use the base:: namespace.

chrome/browser/extensions/extension_error_ui.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/extension_error_ui.h"
 
 #include "base/logging.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 30 matching lines @@
   CHECK(extension_template_message_id);
   CHECK(app_template_message_id);
   base::string16 message;
 
   for (ExtensionIdSet::const_iterator iter = extensions->begin();
        iter != extensions->end(); ++iter) {
     const extensions::Extension* e =
         extension_service_->GetInstalledExtension(*iter);
     message += l10n_util::GetStringFUTF16(
         e->is_app() ? app_template_message_id : extension_template_message_id,
-        base::UTF8ToUTF16(e->name())) + char16('\n');
+        base::UTF8ToUTF16(e->name())) + base::char16('\n');
   }
   return message;
 }
 
 base::string16 ExtensionErrorUI::GenerateMessage() {
   return GenerateMessageSection(external_extension_ids_.get(),
                                 IDS_EXTENSION_ALERT_ITEM_EXTERNAL,
                                 IDS_APP_ALERT_ITEM_EXTERNAL) +
          GenerateMessageSection(blacklisted_extension_ids_.get(),
                                 IDS_EXTENSION_ALERT_ITEM_BLACKLISTED,
@@ skipping 26 matching lines @@
   extension_service_->HandleExtensionAlertClosed();
 }
 
 void ExtensionErrorUI::BubbleViewAcceptButtonPressed() {
   extension_service_->HandleExtensionAlertAccept();
 }
 
 void ExtensionErrorUI::BubbleViewCancelButtonPressed() {
   extension_service_->HandleExtensionAlertDetails();
 }