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

ios/chrome/browser/net/ios_chrome_url_request_context_getter.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_CHROME_BROWSER_NET_IOS_CHROME_URL_REQUEST_CONTEXT_GETTER_H_
 #define IOS_CHROME_BROWSER_NET_IOS_CHROME_URL_REQUEST_CONTEXT_GETTER_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "ios/chrome/browser/net/net_types.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
 
 class ChromeBrowserStateIOData;
 class IOSChromeURLRequestContextFactory;
 
 // A net::URLRequestContextGetter subclass used by the browser. This returns a
 // subclass of net::URLRequestContext which can be used to store extra
 // information about requests.
 //
 // Most methods are expected to be called on the UI thread, except for
 // the destructor and GetURLRequestContext().
 class IOSChromeURLRequestContextGetter : public net::URLRequestContextGetter {
  public:
   // Constructs a ChromeURLRequestContextGetter that will use |factory| to
   // create the URLRequestContext.
   explicit IOSChromeURLRequestContextGetter(
-      scoped_ptr<IOSChromeURLRequestContextFactory> factory);
+      std::unique_ptr<IOSChromeURLRequestContextFactory> factory);
 
   // Note that GetURLRequestContext() can only be called from the IO
   // thread (it will assert otherwise).
   // GetIOMessageLoopProxy however can be called from any thread.
   //
   // net::URLRequestContextGetter implementation.
   net::URLRequestContext* GetURLRequestContext() override;
   scoped_refptr<base::SingleThreadTaskRunner> GetNetworkTaskRunner()
       const override;
 
@@ skipping 12 matching lines @@
 
   // Discard reference to URLRequestContext and inform observers of shutdown.
   // Must be called before destruction. May only be called on IO thread.
   void NotifyContextShuttingDown();
 
  private:
   ~IOSChromeURLRequestContextGetter() override;
 
   // Deferred logic for creating a URLRequestContext.
   // Access only from the IO thread.
-  scoped_ptr<IOSChromeURLRequestContextFactory> factory_;
+  std::unique_ptr<IOSChromeURLRequestContextFactory> factory_;
 
   // NULL before initialization and after invalidation.
   // Otherwise, it is the URLRequestContext instance that
   // was lazily created by GetURLRequestContext().
   // Access only from the IO thread.
   net::URLRequestContext* url_request_context_;
 
   DISALLOW_COPY_AND_ASSIGN(IOSChromeURLRequestContextGetter);
 };
 
 #endif  // IOS_CHROME_BROWSER_NET_IOS_CHROME_URL_REQUEST_CONTEXT_GETTER_H_