fix a problem that android cannot download files with basic authentication

net/url_request/url_request_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_URL_REQUEST_URL_REQUEST_JOB_H_
 #define NET_URL_REQUEST_URL_REQUEST_JOB_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 139 matching lines @@
   // location.  This may be used to implement protocol-specific restrictions.
   // If this function returns false, then the URLRequest will fail
   // reporting ERR_UNSAFE_REDIRECT.
   virtual bool IsSafeRedirect(const GURL& location);
 
   // Called to determine if this response is asking for authentication.  Only
   // makes sense for some types of requests.  The caller is responsible for
   // obtaining the credentials passing them to SetAuth.
   virtual bool NeedsAuth();
 
+  // Determine whether the request has authentication credentials. This call
+  // will return true of SetAuth() is called without any subsequent CancelAuth()
+  // calls.
+  virtual bool HasAuth() const OVERRIDE;
+
   // Fills the authentication info with the server's response.
   virtual void GetAuthChallengeInfo(
       scoped_refptr<AuthChallengeInfo>* auth_info);
 
   // Resend the request with authentication credentials.
   virtual void SetAuth(const AuthCredentials& credentials);
 
   // Display the error page without asking for credentials again.
   virtual void CancelAuth();
 
@@ skipping 222 matching lines @@
   NetworkDelegate* network_delegate_;
 
   base::WeakPtrFactory<URLRequestJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(URLRequestJob);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_JOB_H_