Change uses of base::JoinString to pass StringPieces where possible.

chrome/browser/extensions/api/networking_private/crypto_verify_impl.cc

 // Copyright 2014 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/networking_private/crypto_verify_impl.h"
 
 #include <stdint.h>
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/sequenced_task_runner.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/extensions/api/networking_private/networking_private_credentials_getter.h"
 #include "chrome/browser/extensions/api/networking_private/networking_private_crypto.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/browser/api/networking_private/networking_private_api.h"
 #include "extensions/browser/api/networking_private/networking_private_service_client.h"
 #include "extensions/common/api/networking_private.h"
 
@@ skipping 135 matching lines @@
 
 }  // namespace
 
 CryptoVerifyImpl::Credentials::Credentials(
     const VerificationProperties& properties) {
   certificate = properties.certificate;
   if (properties.intermediate_certificates.get())
     intermediate_certificates = *properties.intermediate_certificates;
   signed_data = properties.signed_data;
 
-  std::vector<std::string> data_parts;
-  data_parts.push_back(properties.device_ssid);
-  data_parts.push_back(properties.device_serial);
-  data_parts.push_back(properties.device_bssid);
-  data_parts.push_back(properties.public_key);
-  data_parts.push_back(properties.nonce);
-  unsigned_data = base::JoinString(data_parts, ",");
+  unsigned_data = base::JoinString(
+      {properties.device_ssid, properties.device_serial,
+       properties.device_bssid, properties.public_key, properties.nonce},
+      ",");
 
   device_bssid = properties.device_bssid;
   public_key = properties.public_key;
 }
 
 CryptoVerifyImpl::Credentials::Credentials(const Credentials& other) = default;
 
 CryptoVerifyImpl::Credentials::~Credentials() {
 }
 
@@ skipping 48 matching lines @@
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   Credentials credentials(verification_properties);
   base::PostTaskAndReplyWithResult(
       blocking_pool_task_runner_.get(), FROM_HERE,
       base::Bind(&DoVerifyAndEncryptData, credentials, data),
       base::Bind(&VerifyAndEncryptDataCompleted, success_callback,
                  failure_callback));
 }
 
 }  // namespace extensions