ios: Use stl utilities from the base namespace

ios/chrome/browser/browser_state/chrome_browser_state_io_data.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 "ios/chrome/browser/browser_state/chrome_browser_state_io_data.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 250 matching lines @@
     const {
   DCHECK(initialized_);
   return main_request_context_.get();
 }
 
 net::URLRequestContext* ChromeBrowserStateIOData::GetIsolatedAppRequestContext(
     net::URLRequestContext* main_context,
     const base::FilePath& partition_path) const {
   DCHECK(initialized_);
   AppRequestContext* context = nullptr;
-  if (ContainsKey(app_request_context_map_, partition_path)) {
+  if (base::ContainsKey(app_request_context_map_, partition_path)) {
     context = app_request_context_map_[partition_path];
   } else {
     context = AcquireIsolatedAppRequestContext(main_context);
     app_request_context_map_[partition_path] = context;
   }
   DCHECK(context);
   return context;
 }
 
 void ChromeBrowserStateIOData::SetCookieStoreForPartitionPath(
     std::unique_ptr<net::CookieStore> cookie_store,
     const base::FilePath& partition_path) {
-  DCHECK(ContainsKey(app_request_context_map_, partition_path));
+  DCHECK(base::ContainsKey(app_request_context_map_, partition_path));
   app_request_context_map_[partition_path]->SetCookieStore(
       std::move(cookie_store));
 }
 
 content_settings::CookieSettings* ChromeBrowserStateIOData::GetCookieSettings()
     const {
   DCHECK(initialized_);
   return cookie_settings_.get();
 }
 
@@ skipping 189 matching lines @@
   return std::unique_ptr<net::HttpCache>(
       new net::HttpCache(session, std::move(main_backend), true));
 }
 
 std::unique_ptr<net::HttpCache> ChromeBrowserStateIOData::CreateHttpFactory(
     net::HttpNetworkSession* shared_session,
     std::unique_ptr<net::HttpCache::BackendFactory> backend) const {
   return std::unique_ptr<net::HttpCache>(
       new net::HttpCache(shared_session, std::move(backend), true));
 }