Add explicit base namespace to string16 users.

chrome/common/extensions/api/system_indicator/system_indicator_handler.cc

 // Copyright (c) 2013 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/common/extensions/api/system_indicator/system_indicator_handler.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/common/extensions/api/extension_action/action_info.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest_constants.h"
 #include "extensions/common/permissions/api_permission_set.h"
 #include "extensions/common/permissions/permissions_data.h"
 
 namespace extensions {
 
 SystemIndicatorHandler::SystemIndicatorHandler() {
 }
 
 SystemIndicatorHandler::~SystemIndicatorHandler() {
 }
 
-bool SystemIndicatorHandler::Parse(Extension* extension, string16* error) {
+bool SystemIndicatorHandler::Parse(Extension* extension,
+                                   base::string16* error) {
   const base::DictionaryValue* system_indicator_value = NULL;
   if (!extension->manifest()->GetDictionary(
           manifest_keys::kSystemIndicator, &system_indicator_value)) {
     *error = ASCIIToUTF16(manifest_errors::kInvalidSystemIndicator);
     return false;
   }
 
   scoped_ptr<ActionInfo> action_info = ActionInfo::Load(
       extension, system_indicator_value, error);
 
   if (!action_info.get())
     return false;
 
   // Because the manifest was successfully parsed, auto-grant the permission.
   // TODO(dewittj) Add this for all extension action APIs.
   PermissionsData::GetInitialAPIPermissions(extension)->insert(
       APIPermission::kSystemIndicator);
 
   ActionInfo::SetSystemIndicatorInfo(extension, action_info.release());
   return true;
 }
 
 const std::vector<std::string> SystemIndicatorHandler::Keys() const {
   return SingleKey(manifest_keys::kSystemIndicator);
 }
 
 }  // namespace extensions