Implement offline mode behind a flag

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 807 matching lines @@
   send_start_time_ = base::TimeTicks::Now();
   next_state_ = STATE_SEND_REQUEST_COMPLETE;
 
   return stream_->SendRequest(request_headers_, &response_, io_callback_);
 }
 
 int HttpNetworkTransaction::DoSendRequestComplete(int result) {
   send_end_time_ = base::TimeTicks::Now();
   if (result < 0)
     return HandleIOError(result);
+  response_.network_accessed = true;
   next_state_ = STATE_READ_HEADERS;
   return OK;
 }
 
 int HttpNetworkTransaction::DoReadHeaders() {
   next_state_ = STATE_READ_HEADERS_COMPLETE;
   return stream_->ReadResponseHeaders(io_callback_);
 }
 
 int HttpNetworkTransaction::HandleConnectionClosedBeforeEndOfHeaders() {
@@ skipping 590 matching lines @@
       description = base::StringPrintf("Unknown state 0x%08X (%u)", state,
                                        state);
       break;
   }
   return description;
 }
 
 #undef STATE_CASE
 
 }  // namespace net