chrome: Use stl utilities from the base namespace

chrome/browser/sync_file_system/drive_backend/tracker_id_set.cc

 // Copyright 2014 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/sync_file_system/drive_backend/tracker_id_set.h"
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "chrome/browser/sync_file_system/drive_backend/metadata_database.pb.h"
 
@@ skipping 22 matching lines @@
 }
 
 void TrackerIDSet::InsertInactiveTracker(int64_t tracker_id) {
   DCHECK(tracker_id);
   DCHECK_NE(active_tracker_, tracker_id);
 
   tracker_ids_.insert(tracker_id);
 }
 
 void TrackerIDSet::Erase(int64_t tracker_id) {
-  DCHECK(ContainsKey(tracker_ids_, tracker_id));
+  DCHECK(base::ContainsKey(tracker_ids_, tracker_id));
 
   if (active_tracker_ == tracker_id)
     active_tracker_ = 0;
   tracker_ids_.erase(tracker_id);
 }
 
 void TrackerIDSet::Activate(int64_t tracker_id) {
   DCHECK(!active_tracker_);
-  DCHECK(ContainsKey(tracker_ids_, tracker_id));
+  DCHECK(base::ContainsKey(tracker_ids_, tracker_id));
   active_tracker_ = tracker_id;
 }
 
 void TrackerIDSet::Deactivate(int64_t tracker_id) {
   DCHECK_EQ(active_tracker_, tracker_id);
-  DCHECK(ContainsKey(tracker_ids_, tracker_id));
+  DCHECK(base::ContainsKey(tracker_ids_, tracker_id));
   active_tracker_ = 0;
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system