PlzNavigate: Implement RequestNavigation on the renderer side

content/child/web_url_request_util.h

 // Copyright 2014 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.
 
 #ifndef CONTENT_CHILD_TARGET_TYPE_CONVERSION_H_
 #define CONTENT_CHILD_TARGET_TYPE_CONVERSION_H_
 
+#include <string>
+
 #include "content/common/content_export.h"
 #include "content/public/common/resource_type.h"
 
 namespace blink {
 class WebURLRequest;
 }
 
 namespace content {
 
 CONTENT_EXPORT ResourceType WebURLRequestToResourceType(
     const blink::WebURLRequest& request);
 
+std::string GetWebURLRequestHeaders(const blink::WebURLRequest& request);
+
+int GetLoadFlagsForWebURLRequest(const blink::WebURLRequest& request);
+
 }  // namespace content
 
 #endif  // CONTENT_CHILD_TARGET_TYPE_CONVERSION_H_