Fix build error with gcc 4.8.2 about WARN_UNUSED_RESULT

components/visitedlink/browser/visitedlink_master.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/visitedlink/browser/visitedlink_master.h"
 
 #include <stdio.h>
 #include <string.h>
 #include <algorithm>
 #include <utility>
@@ skipping 264 matching lines @@
   }
 }
 
 void VisitedLinkMaster::InitMembers() {
   file_ = NULL;
   shared_memory_ = NULL;
   shared_memory_serial_ = 0;
   used_items_ = 0;
   table_size_override_ = 0;
   suppress_rebuild_ = false;
-  sequence_token_ = BrowserThread::GetBlockingPool()->GetSequenceToken();
+  sequence_token_ = base::SequencedWorkerPool::GetSequenceToken();
 }
 
 bool VisitedLinkMaster::Init() {
   // Create the temporary table. If the table is rebuilt that temporary table
   // will be became the main table.
   // The salt must be generated before the table so that it can be copied to
   // the shared memory.
   GenerateSalt(salt_);
   if (!CreateURLTable(DefaultTableSize()))
     return false;
@@ skipping 899 matching lines @@
       BrowserThread::UI, FROM_HERE,
       base::Bind(&TableBuilder::OnCompleteMainThread, this));
 }
 
 void VisitedLinkMaster::TableBuilder::OnCompleteMainThread() {
   if (master_)
     master_->OnTableRebuildComplete(success_, fingerprints_);
 }
 
 }  // namespace visitedlink