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

ios/chrome/browser/browsing_data/browsing_data_remover_helper.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_REMOVER_HELPER_H_
 #define IOS_CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_REMOVER_HELPER_H_
 
 #include <map>
+#include <memory>
 #include <vector>
 
 #include "base/callback.h"
-#include "base/memory/scoped_ptr.h"
 #include "ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.h"
 
 namespace ios {
 class ChromeBrowserState;
 }
 
 // A helper class that serializes execution of IOSChromeBrowsingDataRemover
 // methods since the IOSChromeBrowsingDataRemover APIs are not re-entrant.
 class BrowsingDataRemoverHelper
     : public IOSChromeBrowsingDataRemover::Observer {
@@ skipping 26 matching lines @@
     std::vector<base::Closure> callbacks;
   };
 
   // IOSChromeBrowsingDataRemover::Observer methods.
   void OnIOSChromeBrowsingDataRemoverDone() override;
 
   // Removes the browsing data using IOSChromeBrowsingDataRemover.
   // IOSChromeBrowsingDataRemover
   // must not be running.
   void DoRemove(ios::ChromeBrowserState* browser_state,
-                scoped_ptr<BrowsingDataRemovalInfo> removal_info);
+                std::unique_ptr<BrowsingDataRemovalInfo> removal_info);
 
   // A map that contains the all the ChromeBrowserStates that have a removal
   // operation pending along with their associated BrowsingDataRemovalInfo.
-  std::map<ios::ChromeBrowserState*, scoped_ptr<BrowsingDataRemovalInfo>>
+  std::map<ios::ChromeBrowserState*, std::unique_ptr<BrowsingDataRemovalInfo>>
       pending_removals_;
   // The BrowsingDataRemovalInfo of the currently enqueued removal operation.
-  scoped_ptr<BrowsingDataRemovalInfo> current_removal_info_;
+  std::unique_ptr<BrowsingDataRemovalInfo> current_removal_info_;
   // The actual object that perfoms the removal of browsing data.
   IOSChromeBrowsingDataRemover* current_remover_;
 };
 
 #endif  // IOS_CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_REMOVER_HELPER_H_