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

ios/chrome/browser/installation_notifier.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/installation_notifier.h"
 
+#import <UIKit/UIKit.h>
 #include <stdint.h>
-#import <UIKit/UIKit.h>
+
+#include <memory>
 
 #include "base/ios/weak_nsobject.h"
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 #include "ios/web/public/web_thread.h"
 #include "net/base/backoff_entry.h"
 #include "url/gurl.h"
 
 namespace {
 const net::BackoffEntry::Policy kPollingBackoffPolicy = {
     0,          // Number of errors to ignore.
     1 * 1000,   // Initial delay in milliseconds.
     1.5,        // Multiply factor.
@@ skipping 31 matching lines @@
 
 @interface InstallationNotifier (Testing)
 // Sets the dispatcher.
 - (void)setDispatcher:(id<DispatcherProtocol>)dispatcher;
 // Sets the UIApplication used to determine if a scheme can be opened by an
 // application.
 - (void)setSharedApplication:(UIApplication*)sharedApplication;
 @end
 
 @implementation InstallationNotifier {
-  scoped_ptr<net::BackoffEntry> _backoffEntry;
+  std::unique_ptr<net::BackoffEntry> _backoffEntry;
   base::scoped_nsprotocol<id<DispatcherProtocol>> _dispatcher;
   // Dictionary mapping URL schemes to mutable sets of observers.
   base::scoped_nsobject<NSMutableDictionary> _installedAppObservers;
   NSNotificationCenter* _notificationCenter;  // Weak.
 
   // This object can be a fake application in unittests.
   UIApplication* sharedApplication_;  // Weak.
 }
 
 @synthesize lastCreatedBlockId = lastCreatedBlockId_;
@@ skipping 139 matching lines @@
 }
 
 - (void)setSharedApplication:(id)sharedApplication {
   // Verify that the test application object responds to all the selectors that
   // will be called on it.
   CHECK([sharedApplication respondsToSelector:@selector(canOpenURL:)]);
   sharedApplication_ = (UIApplication*)sharedApplication;
 }
 
 @end