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

ios/web/navigation/crw_session_entry.h

 // Copyright 2012 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.
 
 #ifndef IOS_WEB_NAVIGATION_CRW_SESSION_ENTRY_H_
 #define IOS_WEB_NAVIGATION_CRW_SESSION_ENTRY_H_
 
 #import <Foundation/Foundation.h>
 #include <stdint.h>
 
-#include "base/memory/scoped_ptr.h"
+#include <memory>
+
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
 namespace web {
 class NavigationItem;
 class NavigationItemImpl;
 struct Referrer;
 
@@ skipping 42 matching lines @@
 @property(nonatomic, readonly) const GURL& originalUrl;
 
 // Pointer to the NavigationItem associated with this CRWSessionEntry.
 // Eventually, this will replace CRWSessionEntry entirely.
 @property(nonatomic, readonly) web::NavigationItem* navigationItem;
 
 // Pointer to the NavigationItemImpl associated with this CRWSessionEntry.
 @property(nonatomic, readonly) web::NavigationItemImpl* navigationItemImpl;
 
 // Initialize the session entry with the given NavigationItem.
-- (instancetype)initWithNavigationItem:(scoped_ptr<web::NavigationItem>)item;
+- (instancetype)initWithNavigationItem:
+    (std::unique_ptr<web::NavigationItem>)item;
 
 @end
 
 #endif  // IOS_WEB_NAVIGATION_CRW_SESSION_ENTRY_H_