Give URLRequestJob::GetResponseCode a better default implementation.

net/test/url_request/url_request_failed_job.h

 // Copyright (c) 2012 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_FAILED_JOB_H_
 #define NET_TEST_URL_REQUEST_URL_REQUEST_FAILED_JOB_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 23 matching lines @@
                       int net_error);
 
   // Same as above, except that the job fails at FailurePhase.START.
   URLRequestFailedJob(URLRequest* request,
                       NetworkDelegate* network_delegate,
                       int net_error);
 
   // URLRequestJob implementation:
   void Start() override;
   int ReadRawData(IOBuffer* buf, int buf_size) override;
-  int GetResponseCode() const override;
   void GetResponseInfo(HttpResponseInfo* info) override;
   void PopulateNetErrorDetails(NetErrorDetails* details) const override;
   int64_t GetTotalReceivedBytes() const override;
 
   // Adds the testing URLs to the URLRequestFilter.
   static void AddUrlHandler();
   static void AddUrlHandlerForHostname(const std::string& hostname);
 
   // Given a net error code, constructs a mock URL that will return that error
   // asynchronously when started. |net_error| must be a valid net error code
@@ skipping 28 matching lines @@
   int64_t total_received_bytes_;
 
   base::WeakPtrFactory<URLRequestFailedJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestFailedJob);
 };
 
 }  // namespace net
 
 #endif  // NET_TEST_URL_REQUEST_URL_REQUEST_FAILED_JOB_H_