Convert //ios from scoped_ptr to std::unique_ptr.

ios/web/web_state/crw_pass_kit_downloader.mm

 // 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.
 
 #import "ios/web/web_state/crw_pass_kit_downloader.h"
 
+#include <memory>
+
 #import "base/ios/weak_nsobject.h"
 #include "base/mac/scoped_block.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ios/web/crw_network_activity_indicator_manager.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "net/url_request/url_request_context_getter.h"
 
 using net::URLFetcher;
 using net::URLFetcherDelegate;
@@ skipping 58 matching lines @@
 };
 
 }  // namespace
 
 @implementation CRWPassKitDownloader {
   // Completion handler that is called when PassKit data is downloaded.
   base::mac::ScopedBlock<web::PassKitCompletionHandler> _completionHandler;
 
   // URLFetcher with which PassKit data is downloaded. It is initialized
   // whenever |downloadPassKitFileWithURL| is called.
-  scoped_ptr<URLFetcher> _fetcher;
+  std::unique_ptr<URLFetcher> _fetcher;
 
   // Delegate to bridge between URLFetcher callback and CRWPassKitDownlaoder.
-  scoped_ptr<PassKitFetcherDelegate> _fetcherDelegate;
+  std::unique_ptr<PassKitFetcherDelegate> _fetcherDelegate;
 
   // Context getter which is passed to the URLFetcher, as required by
   // URLFetcher API.
   scoped_refptr<URLRequestContextGetter> _requestContextGetter;
 
   // Network activity ID for this instance of CRWPassKitDownloader.
   int _passKitDownloaderID;
 }
 
 #pragma mark - Public Methods
@@ skipping 90 matching lines @@
       stringWithFormat:@"PassKitDownloader.NetworkActivityIndicatorKey.%d",
                        _passKitDownloaderID];
 }
 
 - (void)reportUMAPassKitResult:(DownloadPassKitResult)result {
   UMA_HISTOGRAM_ENUMERATION(kUMADownloadPassKitResult, result,
                             DOWNLOAD_PASS_KIT_RESULT_COUNT);
 }
 
 @end