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

ios/web/net/crw_ssl_status_updater_unittest.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.
 
 #import "ios/web/net/crw_ssl_status_updater.h"
 
 #include "base/mac/scoped_block.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ios/web/navigation/crw_session_controller.h"
 #import "ios/web/navigation/crw_session_controller+private_constructors.h"
@@ skipping 103 matching lines @@
                                referrer:Referrer()
                              transition:ui::PAGE_TRANSITION_LINK
                       rendererInitiated:NO];
     [session_controller commitPendingEntry];
 
     return session_controller.autorelease();
   }
 
   base::scoped_nsobject<CRWSSLStatusUpdaterTestDataSource> data_source_;
   base::scoped_nsprotocol<id> delegate_;
-  scoped_ptr<web::NavigationManagerImpl> nav_manager_;
+  std::unique_ptr<web::NavigationManagerImpl> nav_manager_;
   base::scoped_nsobject<CRWSSLStatusUpdater> ssl_status_updater_;
   base::scoped_nsobject<NSArray> cert_chain_;
 };
 
 // Tests that CRWSSLStatusUpdater init returns non nil object.
 TEST_F(CRWSSLStatusUpdaterTest, Initialization) {
   EXPECT_TRUE(ssl_status_updater_);
 }
 
 // Tests updating http navigation item.
@@ skipping 195 matching lines @@
   [data_source_
       finishVerificationWithCertStatus:0
                          securityStyle:web::SECURITY_STYLE_AUTHENTICATED];
 
   // Make sure that security style and content status did change.
   EXPECT_EQ(web::SECURITY_STYLE_UNAUTHENTICATED, item->GetSSL().security_style);
   EXPECT_EQ(web::SSLStatus::NORMAL_CONTENT, item->GetSSL().content_status);
 }
 
 }  // namespace web