Replaced NavigationContext::IsErrorPage with NavigationContext::GetError

ios/chrome/browser/tabs/tab.mm

 // Copyright 2012 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/tabs/tab.h"
 
 #import <CoreLocation/CoreLocation.h>
 #import <UIKit/UIKit.h>
 
 #include <utility>
@@ skipping 105 matching lines @@
 #include "ios/web/public/interstitials/web_interstitial.h"
 #include "ios/web/public/load_committed_details.h"
 #import "ios/web/public/navigation_manager.h"
 #include "ios/web/public/referrer.h"
 #import "ios/web/public/serializable_user_data_manager.h"
 #include "ios/web/public/ssl_status.h"
 #include "ios/web/public/url_scheme_util.h"
 #include "ios/web/public/url_util.h"
 #include "ios/web/public/web_client.h"
 #import "ios/web/public/web_state/js/crw_js_injection_receiver.h"
-#include "ios/web/public/web_state/navigation_context.h"
+#import "ios/web/public/web_state/navigation_context.h"
 #import "ios/web/public/web_state/ui/crw_generic_content_view.h"
 #include "ios/web/public/web_state/web_state.h"
 #import "ios/web/public/web_state/web_state_observer_bridge.h"
 #include "ios/web/public/web_thread.h"
 #import "ios/web/web_state/ui/crw_web_controller.h"
 #import "ios/web/web_state/web_state_impl.h"
 #include "net/base/escape.h"
 #include "net/base/filename_util.h"
 #import "net/base/mac/url_conversions.h"
 #include "net/base/net_errors.h"
@@ skipping 1020 matching lines @@
 
 - (void)webState:(web::WebState*)webState
     didFinishNavigation:(web::NavigationContext*)navigation {
   if (navigation->IsSameDocument()) {
     // Fetch the favicon for the new URL.
     auto* faviconDriver = favicon::WebFaviconDriver::FromWebState(webState);
     if (faviconDriver)
       faviconDriver->FetchFavicon(navigation->GetUrl());
   }
 
-  if (!navigation->IsErrorPage()) {
+  if (!navigation->GetError()) {
     [self addCurrentEntryToHistoryDB];
     [self countMainFrameLoad];
   }
 
   [_parentTabModel notifyTabChanged:self];
 }
 
 // Records metric for the interface's orientation.
 - (void)recordInterfaceOrientation {
   switch ([[UIApplication sharedApplication] statusBarOrientation]) {
@@ skipping 721 matching lines @@
 
 - (TabModel*)parentTabModel {
   return _parentTabModel;
 }
 
 - (FormInputAccessoryViewController*)inputAccessoryViewController {
   return _inputAccessoryViewController;
 }
 
 @end