Eliminate content::BrowserThread knowledge from VariationsService

chrome/browser/metrics/variations/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 "chrome/browser/metrics/variations/variations_service.h"
 
 #include "base/build_time.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/sys_info.h"
 #include "base/task_runner_util.h"
 #include "base/timer/elapsed_timer.h"
 #include "base/values.h"
 #include "base/version.h"
 #include "chrome/browser/metrics/variations/generated_resources_map.h"
 #include "chrome/common/channel_info.h"
 #include "chrome/common/chrome_switches.h"
 #include "components/metrics/metrics_state_manager.h"
 #include "components/network_time/network_time_tracker.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/variations/pref_names.h"
 #include "components/variations/proto/variations_seed.pb.h"
 #include "components/variations/variations_seed_processor.h"
 #include "components/variations/variations_seed_simulator.h"
 #include "components/variations/variations_url_constants.h"
 #include "components/version_info/version_info.h"
-#include "content/public/browser/browser_thread.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
 #include "net/base/network_change_notifier.h"
 #include "net/base/url_util.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_status_code.h"
 #include "net/http/http_util.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_status.h"
 #include "ui/base/device_form_factor.h"
@@ skipping 485 matching lines @@
     return false;
   }
   RecordLastFetchTime();
 
   // Perform seed simulation only if |state_manager_| is not-NULL. The state
   // manager may be NULL for some unit tests.
   if (!state_manager_)
     return true;
 
   base::PostTaskAndReplyWithResult(
-      content::BrowserThread::GetBlockingPool(),
+      client_->GetBlockingPool(),
       FROM_HERE,
       base::Bind(&GetVersionForSimulation),
       base::Bind(&VariationsService::PerformSimulationWithVersion,
                  weak_ptr_factory_.GetWeakPtr(), base::Passed(&seed)));
   return true;
 }
 
 void VariationsService::FetchVariationsSeed() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
@@ skipping 230 matching lines @@
   // Otherwise, update the pref with the current Chrome version and country.
   base::ListValue new_list_value;
   new_list_value.AppendString(version.GetString());
   new_list_value.AppendString(latest_country);
   local_state_->Set(prefs::kVariationsPermanentConsistencyCountry,
                     new_list_value);
   return latest_country;
 }
 
 }  // namespace chrome_variations