Fix variations service DCHECK and add LOAD_DO_NOT_SEND_AUTH_DATA.

components/variations/service/variations_service.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 "components/variations/service/variations_service.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 503 matching lines @@
     PrefService* local_state) {
   return base::WrapUnique(new VariationsService(
       std::move(client),
       base::MakeUnique<web_resource::ResourceRequestAllowedNotifier>(
           local_state, nullptr),
       local_state, nullptr, UIStringOverrider()));
 }
 
 void VariationsService::DoActualFetch() {
   DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(!pending_seed_request_);
+
+  // Normally, there shouldn't be a |pending_request_| when this fires. However
+  // it's not impossible - for example if Chrome was paused (e.g. in a debugger
+  // or if the machine was suspended) and OnURLFetchComplete() hasn't had a
+  // chance to run yet from the previous request. In this case, don't start a
+  // new request and just let the previous one finish.
+  if (pending_seed_request_)
+    return;
 
   pending_seed_request_ = net::URLFetcher::Create(0, variations_server_url_,
                                                   net::URLFetcher::GET, this);
   data_use_measurement::DataUseUserData::AttachToFetcher(
       pending_seed_request_.get(),
       data_use_measurement::DataUseUserData::VARIATIONS);
   pending_seed_request_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
+                                      net::LOAD_DO_NOT_SEND_AUTH_DATA |
                                       net::LOAD_DO_NOT_SAVE_COOKIES);
   pending_seed_request_->SetRequestContext(client_->GetURLRequestContext());
   bool enable_deltas = false;
   if (!seed_store_.variations_serial_number().empty() &&
       !disable_deltas_for_next_request_) {
     // If the current seed includes a country code, deltas are not supported (as
     // the serial number doesn't take into account the country code). The server
     // will update us with a seed that doesn't include a country code which will
     // enable deltas to work.
     // TODO(asvitkine): Remove the check in M50+ when the percentage of clients
@@ skipping 352 matching lines @@
 
   if (got_stored_country && stored_country == country_override)
     return false;
 
   base::Version version(version_info::GetVersionNumber());
   StorePermanentCountry(version, country_override);
   return true;
 }
 
 }  // namespace variations