Added NavigationContext::IsPost.

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.
 
 #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"
@@ skipping 30 matching lines @@
 }
 
 ui::PageTransition NavigationContextImpl::GetPageTransition() const {
   return page_transition_;
 }
 
 bool NavigationContextImpl::IsSameDocument() const {
   return is_same_document_;
 }
 
+bool NavigationContextImpl::IsPost() const {
+  return is_post_;
+}
+
 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::SetIsPost(bool is_post) {
+  is_post_ = is_post;
+}
+
 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 {
@@ skipping 10 matching lines @@
     : web_state_(web_state),
       url_(url),
       page_transition_(page_transition),
       is_same_document_(false),
       error_(nil),
       response_headers_(nullptr) {}
 
 NavigationContextImpl::~NavigationContextImpl() = default;
 
 }  // namespace web