Replaced NavigationContext::IsErrorPage with NavigationContext::GetError

ios/web/public/test/fakes/crw_test_web_state_observer.mm

 // Copyright 2017 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/public/test/fakes/crw_test_web_state_observer.h"
 
 #include "base/memory/ptr_util.h"
-#include "ios/web/public/web_state/navigation_context.h"
-#include "ios/web/web_state/navigation_context_impl.h"
+#import "ios/web/public/web_state/navigation_context.h"
+#import "ios/web/web_state/navigation_context_impl.h"
 #include "net/http/http_response_headers.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace web {
 TestFormActivityInfo::TestFormActivityInfo() {}
 TestFormActivityInfo::~TestFormActivityInfo() = default;
 TestUpdateFaviconUrlCandidatesInfo::TestUpdateFaviconUrlCandidatesInfo() {}
 TestUpdateFaviconUrlCandidatesInfo::~TestUpdateFaviconUrlCandidatesInfo() =
     default;
 }
@@ skipping 100 matching lines @@
 }
 
 - (web::TestStartLoadingInfo*)startLoadingInfo {
   return _startLoadingInfo.get();
 }
 
 #pragma mark CRWWebStateObserver methods -
 
 - (void)webState:(web::WebState*)webState
     didStartNavigation:(web::NavigationContext*)navigation {
-  ASSERT_TRUE(!navigation->IsErrorPage() || !navigation->IsSameDocument());
+  ASSERT_TRUE(!navigation->GetError() || !navigation->IsSameDocument());
   _didStartNavigationInfo = base::MakeUnique<web::TestDidStartNavigationInfo>();
   _didStartNavigationInfo->web_state = webState;
   std::unique_ptr<web::NavigationContextImpl> context =
       web::NavigationContextImpl::CreateNavigationContext(
           navigation->GetWebState(), navigation->GetUrl());
   context->SetIsSameDocument(navigation->IsSameDocument());
-  context->SetIsErrorPage(navigation->IsErrorPage());
+  context->SetError(navigation->GetError());
   _didStartNavigationInfo->context = std::move(context);
 }
 
 - (void)webState:(web::WebState*)webState
     didCommitNavigationWithDetails:
         (const web::LoadCommittedDetails&)load_details {
   _commitNavigationInfo = base::MakeUnique<web::TestCommitNavigationInfo>();
   _commitNavigationInfo->web_state = webState;
   _commitNavigationInfo->load_details = load_details;
 }
 
 - (void)webState:(web::WebState*)webState
     didFinishNavigation:(web::NavigationContext*)navigation {
-  ASSERT_TRUE(!navigation->IsErrorPage() || !navigation->IsSameDocument());
+  ASSERT_TRUE(!navigation->GetError() || !navigation->IsSameDocument());
   _didFinishNavigationInfo =
       base::MakeUnique<web::TestDidFinishNavigationInfo>();
   _didFinishNavigationInfo->web_state = webState;
   std::unique_ptr<web::NavigationContextImpl> context =
       web::NavigationContextImpl::CreateNavigationContext(
           navigation->GetWebState(), navigation->GetUrl());
   context->SetIsSameDocument(navigation->IsSameDocument());
-  context->SetIsErrorPage(navigation->IsErrorPage());
+  context->SetError(navigation->GetError());
   _didFinishNavigationInfo->context = std::move(context);
 }
 
 - (void)webState:(web::WebState*)webState didLoadPageWithSuccess:(BOOL)success {
   _loadPageInfo = base::MakeUnique<web::TestLoadPageInfo>();
   _loadPageInfo->web_state = webState;
   _loadPageInfo->success = success;
 }
 
 - (void)webStateDidDismissInterstitial:(web::WebState*)webState {
@@ skipping 73 matching lines @@
   _stopLoadingInfo = base::MakeUnique<web::TestStopLoadingInfo>();
   _stopLoadingInfo->web_state = webState;
 }
 
 - (void)webStateDidStartLoading:(web::WebState*)webState {
   _startLoadingInfo = base::MakeUnique<web::TestStartLoadingInfo>();
   _startLoadingInfo->web_state = webState;
 }
 
 @end