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

ios/chrome/browser/browser_state/chrome_browser_state_manager_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_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_MANAGER_IMPL_H_
 #define IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_MANAGER_IMPL_H_
 
 #include <map>
+#include <memory>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ios/chrome/browser/browser_state/browser_state_info_cache.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state_manager.h"
 
 class ChromeBrowserStateImpl;
 
 // ChromeBrowserStateManager implementation.
 class ChromeBrowserStateManagerImpl : public ios::ChromeBrowserStateManager {
  public:
   ChromeBrowserStateManagerImpl();
   ~ChromeBrowserStateManagerImpl() override;
 
   // ChromeBrowserStateManager:
   ios::ChromeBrowserState* GetLastUsedBrowserState() override;
   ios::ChromeBrowserState* GetBrowserState(const base::FilePath& path) override;
   BrowserStateInfoCache* GetBrowserStateInfoCache() override;
   std::vector<ios::ChromeBrowserState*> GetLoadedBrowserStates() override;
 
  private:
   using ChromeBrowserStateImplPathMap =
-      std::map<base::FilePath, scoped_ptr<ChromeBrowserStateImpl>>;
+      std::map<base::FilePath, std::unique_ptr<ChromeBrowserStateImpl>>;
 
   // Get the path of the last used browser state, or if that's undefined, the
   // default browser state.
   base::FilePath GetLastUsedBrowserStateDir(
       const base::FilePath& user_data_dir);
 
   // Final initialization of the browser state.
   void DoFinalInit(ios::ChromeBrowserState* browser_state);
   void DoFinalInitForServices(ios::ChromeBrowserState* browser_state);
 
   // Adds |browser_state| to the browser state info cache if it hasn't been
   // added yet.
   void AddBrowserStateToCache(ios::ChromeBrowserState* browser_state);
 
   // Holds the ChromeBrowserStateImpl instances that this instance has created.
   ChromeBrowserStateImplPathMap browser_states_;
-  scoped_ptr<BrowserStateInfoCache> browser_state_info_cache_;
+  std::unique_ptr<BrowserStateInfoCache> browser_state_info_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserStateManagerImpl);
 };
 
 #endif  // IOS_CHROME_BROWSER_BROWSER_STATE_CHROME_BROWSER_STATE_MANAGER_IMPL_H_