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

ios/chrome/browser/safe_browsing/safe_browsing_blocking_page.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.
 //
 // Implementation of the SafeBrowsingBlockingPage class.
 
 #include "ios/chrome/browser/safe_browsing/safe_browsing_blocking_page.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/i18n/rtl.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "components/google/core/browser/google_util.h"
 #include "components/prefs/pref_service.h"
@@ skipping 118 matching lines @@
     interstitial_reason_ = SB_REASON_HARMFUL;
   else
     interstitial_reason_ = SB_REASON_PHISHING;
 
   // This must be done after calculating |interstitial_reason_| above.
   security_interstitials::MetricsHelper::ReportDetails reporting_info;
   reporting_info.metric_prefix = GetMetricPrefix();
   reporting_info.extra_suffix = GetExtraMetricsSuffix();
   reporting_info.rappor_prefix = GetRapporPrefix();
   reporting_info.rappor_report_type = rappor::SAFEBROWSING_RAPPOR_TYPE;
-  controller_->set_metrics_helper(make_scoped_ptr(
+  controller_->set_metrics_helper(base::WrapUnique(
       new IOSChromeMetricsHelper(web_state, request_url(), reporting_info)));
   controller_->metrics_helper()->RecordUserDecision(
       security_interstitials::MetricsHelper::SHOW);
   controller_->metrics_helper()->RecordUserInteraction(
       security_interstitials::MetricsHelper::TOTAL_VISITS);
   if (IsPrefEnabled(prefs::kSafeBrowsingProceedAnywayDisabled)) {
     controller_->metrics_helper()->RecordUserDecision(
         security_interstitials::MetricsHelper::PROCEEDING_DISABLED);
   }
 
@@ skipping 424 matching lines @@
   } else {
     load_time_data->SetString(
         "finalParagraph",
         l10n_util::GetStringUTF16(IDS_IOS_PHISHING_V3_PROCEED_PARAGRAPH));
   }
 
   load_time_data->SetBoolean(security_interstitials::kDisplayCheckBox, false);
 }
 
 }  // namespace safe_browsing