chrome: Use stl utilities from the base namespace

chrome/browser/extensions/api/platform_keys/verify_trust_api.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 "chrome/browser/extensions/api/platform_keys/verify_trust_api.h"
 
 #include <algorithm>
 
 #include "base/lazy_instance.h"
 #include "base/macros.h"
@@ skipping 158 matching lines @@
     der_cert_chain.push_back(base::StringPiece(
         reinterpret_cast<const char*>(cert_der.data()), cert_der.size()));
   }
   scoped_refptr<net::X509Certificate> cert_chain(
       net::X509Certificate::CreateFromDERCertChain(der_cert_chain));
   if (!cert_chain) {
     callback.Run(platform_keys::kErrorInvalidX509Cert, 0, 0);
     return;
   }
 
-  if (!ContainsKey(extension_to_verifier_, extension_id)) {
+  if (!base::ContainsKey(extension_to_verifier_, extension_id)) {
     extension_to_verifier_[extension_id] =
         make_linked_ptr(net::CertVerifier::CreateDefault().release());
   }
   net::CertVerifier* verifier = extension_to_verifier_[extension_id].get();
 
   std::unique_ptr<net::CertVerifyResult> verify_result(
       new net::CertVerifyResult);
   std::unique_ptr<net::BoundNetLog> net_log(new net::BoundNetLog);
   const int flags = 0;
 
@@ skipping 28 matching lines @@
     std::unique_ptr<net::CertVerifyResult> verify_result,
     RequestState* request_state,
     int return_value) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
 
   callback.Run(std::string() /* no error message */, return_value,
                verify_result->cert_status);
 }
 
 }  // namespace extensions