Give URLRequestJob::GetResponseCode a better default implementation.

net/test/url_request/url_request_hanging_read_job.h

 // Copyright 2016 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 NET_TEST_URL_REQUEST_URL_REQUEST_HANGING_READ_JOB_H_
 #define NET_TEST_URL_REQUEST_URL_REQUEST_HANGING_READ_JOB_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "net/url_request/url_request_job.h"
 
 namespace net {
 
 class URLRequest;
 
 // A URLRequestJob that hangs when try to read response body.
 class URLRequestHangingReadJob : public URLRequestJob {
  public:
   URLRequestHangingReadJob(URLRequest* request,
                            NetworkDelegate* network_delegate);
 
   void Start() override;
   int ReadRawData(IOBuffer* buf, int buf_size) override;
-  int GetResponseCode() const override;
   void GetResponseInfo(HttpResponseInfo* info) override;
 
   // Adds the testing URLs to the URLRequestFilter.
   static void AddUrlHandler();
 
   static GURL GetMockHttpUrl();
   static GURL GetMockHttpsUrl();
 
  private:
   void GetResponseInfoConst(HttpResponseInfo* info) const;
   ~URLRequestHangingReadJob() override;
 
   void StartAsync();
 
   const int content_length_;
   base::WeakPtrFactory<URLRequestHangingReadJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestHangingReadJob);
 };
 
 }  // namespace net
 
 #endif  // NET_TEST_URL_REQUEST_URL_REQUEST_HANGING_READ_JOB_H_