components: Use stl utilities from the base namespace

components/content_settings/core/browser/content_settings_info.cc

 // Copyright 2015 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 "components/content_settings/core/browser/content_settings_info.h"
 
 #include "base/stl_util.h"
 
 namespace content_settings {
 
 ContentSettingsInfo::ContentSettingsInfo(
     const WebsiteSettingsInfo* website_settings_info,
     const std::vector<std::string>& whitelisted_schemes,
     const std::set<ContentSetting>& valid_settings,
     IncognitoBehavior incognito_behavior)
     : website_settings_info_(website_settings_info),
       whitelisted_schemes_(whitelisted_schemes),
       valid_settings_(valid_settings),
       incognito_behavior_(incognito_behavior) {}
 
 ContentSettingsInfo::~ContentSettingsInfo() {}
 
 bool ContentSettingsInfo::IsSettingValid(ContentSetting setting) const {
-  return ContainsKey(valid_settings_, setting);
+  return base::ContainsKey(valid_settings_, setting);
 }
 
 }  // namespace content_settings