Use a direct include of strings headers in chrome/common/, part 1.

chrome/common/extensions/api/extension_api.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/common/extensions/api/extension_api.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
-#include "base/string_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
 #include "base/values.h"
 #include "chrome/common/extensions/api/generated_schemas.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/features/base_feature_provider.h"
 #include "chrome/common/extensions/features/simple_feature.h"
 #include "chrome/common/extensions/permissions/permission_set.h"
 #include "chrome/common/extensions/permissions/permissions_data.h"
 #include "googleurl/src/gurl.h"
 #include "grit/common_resources.h"
 #include "grit/extensions_api_resources.h"
@@ skipping 574 matching lines @@
       PermissionsData::GetOptionalPermissions(extension)->
           HasAnyAccessToAPI(name);
 }
 
 bool ExtensionAPI::IsPrivilegedAPI(const std::string& name) {
   return completely_unprivileged_apis_.count(name) ||
       partially_unprivileged_apis_.count(name);
 }
 
 }  // namespace extensions