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

ios/chrome/browser/autofill/form_input_accessory_view_controller.mm

 // Copyright 2014 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/autofill/form_input_accessory_view_controller.h"
 
+#include <memory>
+
 #include "base/ios/block_types.h"
 #include "base/ios/ios_util.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_block.h"
 #include "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
 #import "components/autofill/core/browser/keyboard_accessory_metrics_logger.h"
 #import "components/autofill/ios/browser/js_suggestion_manager.h"
 #import "ios/chrome/browser/autofill/form_input_accessory_view.h"
 #import "ios/chrome/browser/autofill/form_suggestion_view.h"
 #import "ios/chrome/browser/passwords/password_generation_utils.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #include "ios/web/public/test/crw_test_js_injection_receiver.h"
 #import "ios/web/public/url_scheme_util.h"
 #import "ios/web/public/web_state/crw_web_view_proxy.h"
 #include "ios/web/public/web_state/url_verification_constants.h"
@@ skipping 168 matching lines @@
 // The current web state.
 @property(nonatomic, readonly) web::WebState* webState;
 
 // The current web view proxy.
 @property(nonatomic, readonly) id<CRWWebViewProxy> webViewProxy;
 
 @end
 
 @implementation FormInputAccessoryViewController {
   // Bridge to observe the web state from Objective-C.
-  scoped_ptr<web::WebStateObserverBridge> _webStateObserverBridge;
+  std::unique_ptr<web::WebStateObserverBridge> _webStateObserverBridge;
 
   // Last registered keyboard rectangle.
   CGRect _keyboardFrame;
 
   // The custom view that should be shown in the input accessory view.
   base::scoped_nsobject<UIView> _customAccessoryView;
 
   // The JS manager for interacting with the underlying form.
   base::scoped_nsobject<JsSuggestionManager> _JSSuggestionManager;
 
   // The original subviews in keyboard accessory view that were originally not
   // hidden but were hidden when showing Autofill suggestions.
   base::scoped_nsobject<NSMutableArray> _hiddenOriginalSubviews;
 
   // The objects that can provide a custom input accessory view while filling
   // forms.
   base::scoped_nsobject<NSArray> _providers;
 
   // Whether suggestions have previously been shown.
   BOOL _suggestionsHaveBeenShown;
 
   // The object that manages the currently-shown custom accessory view.
   base::WeakNSProtocol<id<FormInputAccessoryViewProvider>> _currentProvider;
 
   // Logs UMA metrics for the keyboard accessory.
-  scoped_ptr<autofill::KeyboardAccessoryMetricsLogger>
+  std::unique_ptr<autofill::KeyboardAccessoryMetricsLogger>
       _keyboardAccessoryMetricsLogger;
 }
 
 - (instancetype)initWithWebState:(web::WebState*)webState
                        providers:(NSArray*)providers {
   JsSuggestionManager* suggestionManager =
       base::mac::ObjCCastStrict<JsSuggestionManager>(
           [webState->GetJSInjectionReceiver()
               instanceOfClass:[JsSuggestionManager class]]);
   return [self initWithWebState:webState
@@ skipping 409 matching lines @@
 // that we don't present our custom view over the keyboard.
 - (void)textInputDidBeginEditing:(NSNotification*)notification {
   [self reset];
 }
 
 - (void)keyboardDidHide:(NSNotification*)notification {
   _keyboardFrame = CGRectZero;
 }
 
 @end