Preserving extra http request headers in OpenURL navigation path [relanding].

content/browser/frame_host/navigator.h

Index: content/browser/frame_host/navigator.h
diff --git a/content/browser/frame_host/navigator.h b/content/browser/frame_host/navigator.h
index 3e623d34dff5e2bd34a9d8713d08782a581c164d..3424428fc070d950bbe90ae192d2ce6fdfb12075 100644
--- a/content/browser/frame_host/navigator.h
+++ b/content/browser/frame_host/navigator.h
@@ -114,6 +114,7 @@ class CONTENT_EXPORT Navigator : public base::RefCounted<Navigator> {
       const GURL& url,
       bool uses_post,
       const scoped_refptr<ResourceRequestBodyImpl>& body,
+      const std::string& extra_headers,
       SiteInstance* source_site_instance,
       const Referrer& referrer,
       WindowOpenDisposition disposition,
@@ -134,7 +135,8 @@ class CONTENT_EXPORT Navigator : public base::RefCounted<Navigator> {
       const GlobalRequestID& transferred_global_request_id,
       bool should_replace_current_entry,
       const std::string& method,
-      scoped_refptr<ResourceRequestBodyImpl> post_body) {}
+      scoped_refptr<ResourceRequestBodyImpl> post_body,
+      const std::string& extra_headers) {}
 
   // PlzNavigate
   // Called after receiving a BeforeUnloadACK IPC from the renderer. If