Change net::LOAD_MAIN_FRAME to net::LOAD_MAIN_FRAME_DEPRECATED to discourage

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 <memory>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 1173 matching lines @@
     net_log_.AddEventWithNetErrorCode(
         NetLog::TYPE_HTTP_TRANSACTION_RESTART_AFTER_ERROR,
         response_.headers->response_code());
     // This will close the socket - it would be weird to try and reuse it, even
     // if the server doesn't actually close it.
     ResetConnectionAndRequestForResend();
     return OK;
   }
 
   // Like Net.HttpResponseCode, but only for MAIN_FRAME loads.
-  if (request_->load_flags & LOAD_MAIN_FRAME) {
+  if (request_->load_flags & LOAD_MAIN_FRAME_DEPRECATED) {
     const int response_code = response_.headers->response_code();
     UMA_HISTOGRAM_ENUMERATION(
         "Net.HttpResponseCode_Nxx_MainFrame", response_code/100, 10);
   }
 
   net_log_.AddEvent(
       NetLog::TYPE_HTTP_TRANSACTION_READ_RESPONSE_HEADERS,
       base::Bind(&HttpResponseHeaders::NetLogCallback, response_.headers));
 
   if (response_.headers->GetHttpVersion() < HttpVersion(1, 0)) {
@@ skipping 464 matching lines @@
   DCHECK(stream_request_);
 
   // Since the transaction can restart with auth credentials, it may create a
   // stream more than once. Accumulate all of the connection attempts across
   // those streams by appending them to the vector:
   for (const auto& attempt : stream_request_->connection_attempts())
     connection_attempts_.push_back(attempt);
 }
 
 }  // namespace net