fix a problem that android cannot download files with basic authentication

net/http/http_network_transaction.cc

 // 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.
 
 #include "net/http/http_network_transaction.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 756 matching lines @@
   }
 
   if (ShouldApplyProxyAuth() && HaveAuth(HttpAuth::AUTH_PROXY))
     auth_controllers_[HttpAuth::AUTH_PROXY]->AddAuthorizationHeader(
         &request_headers_);
   if (ShouldApplyServerAuth() && HaveAuth(HttpAuth::AUTH_SERVER))
     auth_controllers_[HttpAuth::AUTH_SERVER]->AddAuthorizationHeader(
         &request_headers_);
 
   request_headers_.MergeFrom(request_->extra_headers);
+  response_.did_use_http_auth =
+      request_headers_.HasHeader(HttpRequestHeaders::kAuthorization) ||
+      request_headers_.HasHeader(HttpRequestHeaders::kProxyAuthorization);
 }
 
 int HttpNetworkTransaction::DoInitRequestBody() {
   next_state_ = STATE_INIT_REQUEST_BODY_COMPLETE;
   int rv = OK;
   if (request_->upload_data_stream)
     rv = request_->upload_data_stream->Init(io_callback_);
   return rv;
 }
 
@@ skipping 674 matching lines @@
       description = base::StringPrintf("Unknown state 0x%08X (%u)", state,
                                        state);
       break;
   }
   return description;
 }
 
 #undef STATE_CASE
 
 }  // namespace net