Give URLRequestJob::GetResponseCode a better default implementation.

net/test/url_request/url_request_hanging_read_job.cc

Index: net/test/url_request/url_request_hanging_read_job.cc
diff --git a/net/test/url_request/url_request_hanging_read_job.cc b/net/test/url_request/url_request_hanging_read_job.cc
index 5223b297b4502e95ebdbc4c1bf132cf837b8b75a..5e36dc11e5cdf28df44d41281c5c10f617c3230d 100644
--- a/net/test/url_request/url_request_hanging_read_job.cc
+++ b/net/test/url_request/url_request_hanging_read_job.cc
@@ -65,12 +65,6 @@ int URLRequestHangingReadJob::ReadRawData(IOBuffer* buf, int buf_size) {
   return ERR_IO_PENDING;
 }
 
-int URLRequestHangingReadJob::GetResponseCode() const {
-  HttpResponseInfo info;
-  GetResponseInfoConst(&info);
-  return info.headers->response_code();
-}
-
 // Public virtual version.
 void URLRequestHangingReadJob::GetResponseInfo(HttpResponseInfo* info) {
   // Forward to private const version.