PlzNavigate: Fix the http/tests/loading/307-after-303-after-post.html and the http/tests/loading/re…

third_party/WebKit/Source/web/WebDataSourceImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 41 matching lines @@
 }
 
 const WebURLRequest& WebDataSourceImpl::originalRequest() const {
   return m_originalRequestWrapper;
 }
 
 const WebURLRequest& WebDataSourceImpl::getRequest() const {
   return m_requestWrapper;
 }
 
+WebURLRequest& WebDataSourceImpl::getRequestWritable() {
+  return m_requestWrapper;
+}
 const WebURLResponse& WebDataSourceImpl::response() const {
   return m_responseWrapper;
 }
 
 bool WebDataSourceImpl::hasUnreachableURL() const {
   return !DocumentLoader::unreachableURL().isEmpty();
 }
 
 WebURL WebDataSourceImpl::unreachableURL() const {
   return DocumentLoader::unreachableURL();
@@ skipping 87 matching lines @@
     WebDocumentSubresourceFilter* subresourceFilter) {
   DocumentLoader::setSubresourceFilter(
       SubresourceFilter::create(this, WTF::wrapUnique(subresourceFilter)));
 }
 
 DEFINE_TRACE(WebDataSourceImpl) {
   DocumentLoader::trace(visitor);
 }
 
 }  // namespace blink