Improving the process model extension API

chrome/browser/extensions/extension_function_util.h

+// 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_UTIL_H__
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_UTIL_H__
+#pragma once
+
+#include <vector>
+#include "base/values.h"
+
+namespace base {
+class Value;
+}
+
+// This file contains various utility functions for extension API
+// implementations.
+namespace extensions {
+
+// Reads the |value| as either a single integer value or a list of integers.
+bool ReadOneOrMoreIntegers(base::Value* value, std::vector<int>* result);
+
+} // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_UTIL_H__