Add POST_WITHOUT_BODY to the UrlFetcher's method.

net/url_request/url_fetcher.h

Index: net/url_request/url_fetcher.h
diff --git a/net/url_request/url_fetcher.h b/net/url_request/url_fetcher.h
index 5fa8b3b733b2fa1ec63a7a0ceecc6603fa3efc0e..6d3f0e99862b40599fae667c2b35f9af22bf0e08 100644
--- a/net/url_request/url_fetcher.h
+++ b/net/url_request/url_fetcher.h
@@ -82,6 +82,10 @@ class NET_EXPORT URLFetcher {
                       // <winnt.h> defines a DELETE macro.
     PUT,
     PATCH,
+
+    // This is POST method with no body, no content-type header and
+    // no content-length header.
+    POST_WITHOUT_BODY,
   };
 
   // Used by SetURLRequestUserData.  The callback should make a fresh