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

ios/chrome/browser/updatable_config/updatable_config_base.mm

 // 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.
 
 #import "ios/chrome/browser/updatable_config/updatable_config_base.h"
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/logging.h"
 #import "base/mac/bind_objc_block.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #import "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 #import "ios/public/provider/chrome/browser/updatable_resource_provider.h"
 #include "ios/web/public/web_thread.h"
 #import "net/base/mac/url_conversions.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "url/gurl.h"
@@ skipping 66 matching lines @@
           dispatch_time(DISPATCH_TIME_NOW, kPeriodicCheckInNanoseconds),
           dispatch_get_main_queue(), ^{
             [owner_ checkUpdate];
           });
     }));
   };
 
  private:
   UpdatableConfigBase* owner_;
   id<UpdatableResourceDescriptorBridge> descriptor_;
-  scoped_ptr<net::URLFetcher> fetcher_;
+  std::unique_ptr<net::URLFetcher> fetcher_;
 };
 
 }  // namespace
 
 @implementation UpdatableConfigBase {
   base::scoped_nsprotocol<id<UpdatableResourceBridge>> _updatableResource;
-  scoped_ptr<ConfigFetcher> _configFetcher;
+  std::unique_ptr<ConfigFetcher> _configFetcher;
   scoped_refptr<net::URLRequestContextGetter> _requestContextGetter;
 }
 
 + (void)enableConsistencyCheck {
 #if !defined(NDEBUG)
   g_consistency_check_enabled = YES;
 #endif
 }
 
 // Overrides default designated initializer.
@@ skipping 144 matching lines @@
     return;
   if (!_configFetcher) {
     _configFetcher.reset(
         new ConfigFetcher(self, [_updatableResource descriptor]));
   }
   GURL url = net::GURLWithNSURL([[_updatableResource descriptor] updateURL]);
   _configFetcher->Fetch(url, _requestContextGetter.get());
 }
 
 @end