Added Setters to NavigationContextImpl.

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 <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 */));
+  return result;
+}
+
+// static
+std::unique_ptr<NavigationContextImpl>
 NavigationContextImpl::CreateNavigationContext(
     WebState* web_state,
     const GURL& url,
     const scoped_refptr<net::HttpResponseHeaders>& response_headers) {
   std::unique_ptr<NavigationContextImpl> resut(
       new NavigationContextImpl(web_state, url, false /* is_same_document */,
                                 false /* is_error_page */, response_headers));
   return resut;
 }
 
@@ skipping 43 matching lines @@
 }
 
 bool NavigationContextImpl::IsErrorPage() const {
   return is_error_page_;
 }
 
 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::SetResponseHeaders(
+    const scoped_refptr<net::HttpResponseHeaders>& response_headers) {
+  response_headers_ = response_headers;
+}
+
 NavigationContextImpl::NavigationContextImpl(
     WebState* web_state,
     const GURL& url,
     bool is_same_document,
     bool is_error_page,
     const scoped_refptr<net::HttpResponseHeaders>& response_headers)
     : web_state_(web_state),
       url_(url),
       is_same_document_(is_same_document),
       is_error_page_(is_error_page),
       response_headers_(response_headers) {}
 
 NavigationContextImpl::~NavigationContextImpl() = default;
 
 }  // namespace web