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

ios/web/web_state/ui/crw_wk_web_view_web_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/web/web_state/ui/crw_wk_web_view_web_controller.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 172 matching lines @@
       _certVerificationController;
 
   // Updates SSLStatus for current navigation item.
   base::scoped_nsobject<CRWSSLStatusUpdater> _SSLStatusUpdater;
 
   // CertVerification errors which happened inside
   // |webView:didReceiveAuthenticationChallenge:completionHandler:|.
   // Key is leaf-cert/host pair. This storage is used to carry calculated
   // cert status from |didReceiveAuthenticationChallenge:| to
   // |didFailProvisionalNavigation:| delegate method.
-  scoped_ptr<CertVerificationErrorsCacheType> _certVerificationErrors;
+  std::unique_ptr<CertVerificationErrorsCacheType> _certVerificationErrors;
 
   // YES if the user has interacted with the content area since the last URL
   // change.
   BOOL _interactionRegisteredSinceLastURLChange;
 
   // YES if the web process backing _wkWebView is believed to currently be dead.
   BOOL _webProcessIsDead;
 
   // The WKNavigation for the most recent load request.
   base::scoped_nsobject<WKNavigation> _latestWKNavigation;
@@ skipping 141 matching lines @@
 
 // Called when WKWebView URL has been changed.
 - (void)webViewURLDidChange;
 
 @end
 
 @implementation CRWWKWebViewWebController
 
 #pragma mark CRWWebController public methods
 
-- (instancetype)initWithWebState:(scoped_ptr<web::WebStateImpl>)webState {
+- (instancetype)initWithWebState:(std::unique_ptr<web::WebStateImpl>)webState {
   DCHECK(webState);
   web::BrowserState* browserState = webState->GetBrowserState();
   self = [super initWithWebState:std::move(webState)];
   if (self) {
     _certVerificationController.reset([[CRWCertVerificationController alloc]
         initWithBrowserState:browserState]);
     _certVerificationErrors.reset(
         new CertVerificationErrorsCacheType(kMaxCertErrorsCount));
   }
   return self;
@@ skipping 1356 matching lines @@
         runJavaScriptTextInputPanelWithPrompt:prompt
                                   defaultText:defaultText
                                    requestURL:requestURL
                             completionHandler:completionHandler];
   } else if (completionHandler) {
     completionHandler(nil);
   }
 }
 
 @end