[safe_browsing] Remove unused ContainsBrowseUrl() parameter.

chrome/browser/safe_browsing/safe_browsing_database.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/safe_browsing/safe_browsing_database.h"
 
 #include <algorithm>
 #include <iterator>
 
 #include "base/bind.h"
@@ skipping 643 matching lines @@
     browse_prefix_set_.reset();
     side_effect_free_whitelist_prefix_set_.reset();
     ip_blacklist_.clear();
   }
   // Wants to acquire the lock itself.
   WhitelistEverything(&csd_whitelist_);
   WhitelistEverything(&download_whitelist_);
   return true;
 }
 
-// TODO(lzheng): Remove matching_list, it is not used anywhere.
 bool SafeBrowsingDatabaseNew::ContainsBrowseUrl(
     const GURL& url,
-    std::string* matching_list,
     std::vector<SBPrefix>* prefix_hits,
     std::vector<SBFullHashResult>* full_hits,
     base::Time last_update) {
   // Clear the results first.
-  matching_list->clear();
   prefix_hits->clear();
   full_hits->clear();
 
   std::vector<SBFullHash> full_hashes;
   BrowseFullHashesToCheck(url, false, &full_hashes);
   if (full_hashes.empty())
     return false;
 
   // This function is called on the I/O thread, prevent changes to
   // filter and caches.
@@ skipping 974 matching lines @@
   base::AutoLock locked(lookup_lock_);
   ip_blacklist_.swap(new_blacklist);
 }
 
 bool SafeBrowsingDatabaseNew::IsMalwareIPMatchKillSwitchOn() {
   SBFullHash malware_kill_switch = SBFullHashForString(kMalwareIPKillSwitchUrl);
   std::vector<SBFullHash> full_hashes;
   full_hashes.push_back(malware_kill_switch);
   return ContainsWhitelistedHashes(csd_whitelist_, full_hashes);
 }