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

ios/web/public/interstitials/web_interstitial.h

 // 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.
 
 #ifndef IOS_WEB_PUBLIC_INTERSTITIALS_WEB_INTERSTITIAL_H_
 #define IOS_WEB_PUBLIC_INTERSTITIALS_WEB_INTERSTITIAL_H_
 
-#include "base/memory/scoped_ptr.h"
+#include <memory>
 
 class GURL;
 
 namespace gfx {
 class Size;
 }
 
 namespace web {
 
 class HtmlWebInterstitialDelegate;
@@ skipping 10 matching lines @@
 class WebInterstitial {
  public:
   // Creates an interstitial page to show in |web_state|. Takes ownership of
   // |delegate|. Reloading the interstitial page will result in a new navigation
   // to |url|.  The pointers returned by these functions are self-owning; they
   // manage their own deletion after calling |Show()|.
   static WebInterstitial* CreateHtmlInterstitial(
       WebState* web_state,
       bool new_navigation,
       const GURL& url,
-      scoped_ptr<HtmlWebInterstitialDelegate> delegate);
+      std::unique_ptr<HtmlWebInterstitialDelegate> delegate);
   static WebInterstitial* CreateNativeInterstitial(
       WebState* web_state,
       bool new_navigation,
       const GURL& url,
-      scoped_ptr<NativeWebInterstitialDelegate> delegate);
+      std::unique_ptr<NativeWebInterstitialDelegate> delegate);
 
   // Retrieves the WebInterstitial if any associated with the specified
   // |web_state|.
   static WebInterstitial* GetWebInterstitial(WebState* web_state);
 
   virtual ~WebInterstitial() {}
 
   // Shows the interstitial page in the WebState.
   virtual void Show() = 0;
 
   // Hides the interstitial page.
   virtual void Hide() = 0;
 
   // Reverts to the page showing before the interstitial.
   // Delegates should call this method when the user has chosen NOT to proceed
   // to the target URL.
   // Warning: 'this' has been deleted when this method returns.
   virtual void DontProceed() = 0;
 
   // Delegates should call this method when the user has chosen to proceed to
   // the target URL.
   // Warning: 'this' has been deleted when this method returns.
   virtual void Proceed() = 0;
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_INTERSTITIALS_WEB_INTERSTITIAL_H_