chrome: Use stl utilities from the base namespace

chrome/browser/extensions/test_blacklist_state_fetcher.cc

 // Copyright 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/browser/extensions/test_blacklist_state_fetcher.h"
 
 #include "base/stl_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "net/url_request/url_request_test_util.h"
 
@@ skipping 44 matching lines @@
     return false;
 
   const std::string& request_str = url_fetcher->upload_data();
   ClientCRXListInfoRequest request;
   if (!request.ParseFromString(request_str))
     return false;
 
   std::string id = request.id();
 
   ClientCRXListInfoResponse response;
-  if (ContainsKey(verdicts_, id))
+  if (base::ContainsKey(verdicts_, id))
     response.set_verdict(verdicts_[id]);
   else
     response.set_verdict(ClientCRXListInfoResponse::NOT_IN_BLACKLIST);
 
   std::string response_str;
   response.SerializeToString(&response_str);
 
   url_fetcher->set_status(net::URLRequestStatus());
   url_fetcher->set_response_code(200);
   url_fetcher->SetResponseString(response_str);
   url_fetcher->delegate()->OnURLFetchComplete(url_fetcher);
 
   return true;
 }
 
 }  // namespace extensions