components: Use stl utilities from the base namespace

components/policy/core/common/schema.cc

 // Copyright 2013 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/policy/core/common/schema.h"
 
 #include <limits.h>
 #include <stddef.h>
 
 #include <algorithm>
@@ skipping 470 matching lines @@
              schema.HasKey(schema::kMaximum)) {
     if (type != base::Value::TYPE_INTEGER) {
       *error = "Only integers can have minimum and maximum";
       return false;
     }
     if (!ParseRangedInt(schema, schema_node, error))
       return false;
   }
   std::string id_string;
   if (schema.GetString(schema::kId, &id_string)) {
-    if (ContainsKey(*id_map, id_string)) {
+    if (base::ContainsKey(*id_map, id_string)) {
       *error = "Duplicated id: " + id_string;
       return false;
     }
     (*id_map)[id_string] = *index;
   }
 
   return true;
 }
 
 bool Schema::InternalStorage::ParseDictionary(
@@ skipping 603 matching lines @@
     return false;
   } else {
     int index = rnode->string_pattern_restriction.pattern_index;
     DCHECK(index == rnode->string_pattern_restriction.pattern_index_backup);
     re2::RE2* regex = storage_->CompileRegex(*storage_->string_enums(index));
     return re2::RE2::PartialMatch(str, *regex);
   }
 }
 
 }  // namespace policy