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

ios/chrome/browser/ssl/ios_ssl_blocking_page.mm

 // Copyright 2016 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 "ios/chrome/browser/ssl/ios_ssl_blocking_page.h"
 
 #include <utility>
 
+#include "base/memory/ptr_util.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/security_interstitials/core/metrics_helper.h"
 #include "components/security_interstitials/core/ssl_error_ui.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/interstitials/ios_chrome_controller_client.h"
 #include "ios/chrome/browser/interstitials/ios_chrome_metrics_helper.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ios/public/provider/chrome/browser/browser_constants.h"
@@ skipping 67 matching lines @@
     options_mask &= ~SSLErrorUI::SOFT_OVERRIDE_ENABLED;
 
   // Set up the metrics helper for the SSLErrorUI.
   security_interstitials::MetricsHelper::ReportDetails reporting_info;
   reporting_info.metric_prefix =
       overridable_ ? "ssl_overridable" : "ssl_nonoverridable";
   reporting_info.rappor_prefix = kSSLRapporPrefix;
   reporting_info.rappor_report_type = rappor::UMA_RAPPOR_TYPE;
   IOSChromeMetricsHelper* ios_chrome_metrics_helper =
       new IOSChromeMetricsHelper(web_state, request_url, reporting_info);
-  controller_->set_metrics_helper(make_scoped_ptr(ios_chrome_metrics_helper));
+  controller_->set_metrics_helper(base::WrapUnique(ios_chrome_metrics_helper));
 
   ssl_error_ui_.reset(new SSLErrorUI(request_url, cert_error, ssl_info,
                                      options_mask, time_triggered,
                                      controller_.get()));
 
   // Creating an interstitial without showing (e.g. from chrome://interstitials)
   // it leaks memory, so don't create it here.
 }
 
 bool IOSSSLBlockingPage::ShouldCreateNewNavigation() const {
@@ skipping 83 matching lines @@
   callback_.Reset();
 }
 
 // static
 bool IOSSSLBlockingPage::IsOverridable(int options_mask) {
   const bool is_overridable =
       (options_mask & SSLErrorUI::SOFT_OVERRIDE_ENABLED) &&
       !(options_mask & SSLErrorUI::STRICT_ENFORCEMENT);
   return is_overridable;
 }