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

ios/web/web_state/web_state_impl.h

 // Copyright 2013 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_WEB_STATE_WEB_STATE_IMPL_H_
 #define IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
+#include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/values.h"
 #include "ios/web/navigation/navigation_manager_delegate.h"
 #include "ios/web/navigation/navigation_manager_impl.h"
 #include "ios/web/net/request_tracker_impl.h"
 #include "ios/web/public/web_state/web_state.h"
 #include "url/gurl.h"
 
 @protocol CRWRequestTrackerDelegate;
 @class CRWWebController;
@@ skipping 260 matching lines @@
   // The delegate used to pass state to the web contents facade.
   WebStateFacadeDelegate* facade_delegate_;
 
   // The CRWWebController that backs and owns this object.
   CRWWebController* web_controller_;
 
   NavigationManagerImpl navigation_manager_;
 
   // |web::WebUIIOS| object for the current page if it is a WebUI page that
   // uses the web-based WebUI framework, or nullptr otherwise.
-  scoped_ptr<web::WebUIIOS> web_ui_;
+  std::unique_ptr<web::WebUIIOS> web_ui_;
 
   // A list of observers notified when page state changes. Weak references.
   base::ObserverList<WebStateObserver, true> observers_;
 
   // All the WebStatePolicyDeciders asked for navigation decision. Weak
   // references.
   // WebStatePolicyDeciders are semantically different from observers (they
   // modify the behavior of the WebState) but are used like observers in the
   // code, hence the ObserverList.
   base::ObserverList<WebStatePolicyDecider, true> policy_deciders_;
@@ skipping 28 matching lines @@
   // any WeakPtrs to WebStateImpl are invalidated before its member variable's
   // destructors are executed, rendering them invalid.
   base::WeakPtrFactory<WebState> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebStateImpl);
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_