Replaced NavigationContext::IsErrorPage with NavigationContext::GetError

ios/web/web_state/navigation_context_impl.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.
 
-#include "ios/web/web_state/navigation_context_impl.h"
+#import "ios/web/web_state/navigation_context_impl.h"
 
 #import <Foundation/Foundation.h>
 
 #include "base/memory/ptr_util.h"
 #include "net/http/http_response_headers.h"
 
 namespace web {
 
 // static
 std::unique_ptr<NavigationContextImpl>
 NavigationContextImpl::CreateNavigationContext(WebState* web_state,
                                                const GURL& url) {
-  std::unique_ptr<NavigationContextImpl> result(new NavigationContextImpl(
-      web_state, url, false /* is_same_document */, false /* is_error_page */,
-      nullptr /* response_headers */));
+  std::unique_ptr<NavigationContextImpl> result(
+      new NavigationContextImpl(web_state, url));
   return result;
 }
 
 #ifndef NDEBUG
 NSString* NavigationContextImpl::GetDescription() const {
-  return [NSString stringWithFormat:@"web::WebState: %ld, url: %s, "
-                                     "is_same_document: %@, is_error_page_: %@",
-                                    reinterpret_cast<long>(web_state_),
-                                    url_.spec().c_str(),
-                                    is_same_document_ ? @"true" : @"false",
-                                    is_error_page_ ? @"true" : @"false"];
+  return [NSString
+      stringWithFormat:@"web::WebState: %ld, url: %s, "
+                        "is_same_document: %@, error: %@",
+                       reinterpret_cast<long>(web_state_), url_.spec().c_str(),
+                       is_same_document_ ? @"true" : @"false", error_.get()];
 }
 #endif  // NDEBUG
 
 WebState* NavigationContextImpl::GetWebState() {
   return web_state_;
 }
 
 const GURL& NavigationContextImpl::GetUrl() const {
   return url_;
 }
 
 bool NavigationContextImpl::IsSameDocument() const {
   return is_same_document_;
 }
 
-bool NavigationContextImpl::IsErrorPage() const {
-  return is_error_page_;
+NSError* NavigationContextImpl::GetError() const {
+  return error_;
 }
 
 net::HttpResponseHeaders* NavigationContextImpl::GetResponseHeaders() const {
   return response_headers_.get();
 }
 
 void NavigationContextImpl::SetIsSameDocument(bool is_same_document) {
   is_same_document_ = is_same_document;
 }
 
-void NavigationContextImpl::SetIsErrorPage(bool is_error_page) {
-  is_error_page_ = is_error_page;
+void NavigationContextImpl::SetError(NSError* error) {
+  error_.reset(error);
 }
 
 void NavigationContextImpl::SetResponseHeaders(
     const scoped_refptr<net::HttpResponseHeaders>& response_headers) {
   response_headers_ = response_headers;
 }
 
 int NavigationContextImpl::GetNavigationItemUniqueID() const {
   return navigation_item_unique_id_;
 }
 
 void NavigationContextImpl::SetNavigationItemUniqueID(int unique_id) {
   navigation_item_unique_id_ = unique_id;
 }
 
-NavigationContextImpl::NavigationContextImpl(
-    WebState* web_state,
-    const GURL& url,
-    bool is_same_document,
-    bool is_error_page,
-    const scoped_refptr<net::HttpResponseHeaders>& response_headers)
+NavigationContextImpl::NavigationContextImpl(WebState* web_state,
+                                             const GURL& url)
     : web_state_(web_state),
       url_(url),
-      is_same_document_(is_same_document),
-      is_error_page_(is_error_page),
-      response_headers_(response_headers) {}
+      is_same_document_(false),
+      error_(nil),
+      response_headers_(nullptr) {}
 
 NavigationContextImpl::~NavigationContextImpl() = default;
 
 }  // namespace web