Fix overflow in history expiry code in 64 bit builds.

chrome/browser/history/expire_history_backend.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/history/expire_history_backend.h"
 
 #include <algorithm>
 #include <functional>
 #include <limits>
 
@@ skipping 309 matching lines @@
   // Pick up any bits possibly left over.
   ParanoidExpireHistory();
 }
 
 void ExpireHistoryBackend::ArchiveHistoryBefore(Time end_time) {
   if (!main_db_)
     return;
 
   // Archive as much history as possible before the given date.
   ArchiveSomeOldHistory(end_time, GetAllVisitsReader(),
-                        std::numeric_limits<size_t>::max());
+                        std::numeric_limits<int>::max());
   ParanoidExpireHistory();
 }
 
 void ExpireHistoryBackend::InitWorkQueue() {
   DCHECK(work_queue_.empty()) << "queue has to be empty prior to init";
 
   for (size_t i = 0; i < readers_.size(); i++)
     work_queue_.push(readers_[i]);
 }
 
@@ skipping 425 matching lines @@
   // We use the bookmark service to determine if a URL is bookmarked. The
   // bookmark service is loaded on a separate thread and may not be done by the
   // time we get here. We therefor block until the bookmarks have finished
   // loading.
   if (bookmark_service_)
     bookmark_service_->BlockTillLoaded();
   return bookmark_service_;
 }
 
 }  // namespace history