components: Use stl utilities from the base namespace

components/user_prefs/tracked/segregated_pref_store.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 "components/user_prefs/tracked/segregated_pref_store.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 148 matching lines @@
 void SegregatedPrefStore::ClearMutableValues() {
   NOTIMPLEMENTED();
 }
 
 SegregatedPrefStore::~SegregatedPrefStore() {
   default_pref_store_->RemoveObserver(&aggregating_observer_);
   selected_pref_store_->RemoveObserver(&aggregating_observer_);
 }
 
 PersistentPrefStore* SegregatedPrefStore::StoreForKey(const std::string& key) {
-  return (ContainsKey(selected_preference_names_, key)
+  return (base::ContainsKey(selected_preference_names_, key)
               ? selected_pref_store_
-              : default_pref_store_).get();
+              : default_pref_store_)
+      .get();
 }
 
 const PersistentPrefStore* SegregatedPrefStore::StoreForKey(
     const std::string& key) const {
-  return (ContainsKey(selected_preference_names_, key)
+  return (base::ContainsKey(selected_preference_names_, key)
               ? selected_pref_store_
-              : default_pref_store_).get();
+              : default_pref_store_)
+      .get();
 }