Add constant values for the webNavigation API....

chrome/browser/extensions/extension_web_navigation_api_constants.h

+// Copyright (c) 2010 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.
+
+// Constants used for the WebNavigation API.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_NAVIGATION_API_CONSTANTS_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_NAVIGATION_API_CONSTANTS_H_
+#pragma once
+
+namespace extension_web_navigation_api_constants {
+
+// Keys.
+extern const wchar_t kErrorKey[];
+extern const wchar_t kFrameIdKey[];
+extern const wchar_t kRequestIdKey[];
+extern const wchar_t kSourceTabIdKey[];
+extern const wchar_t kSourceUrlKey[];
+extern const wchar_t kTabIdKey[];
+extern const wchar_t kTargetUrlKey[];
+extern const wchar_t kTimeStampKey[];
+extern const wchar_t kTransitionTypeKey[];
+extern const wchar_t kUrlKey[];
+
+// Events.
+extern const char kOnBeforeNavigate[];
+extern const char kOnBeforeRetarget[];
+extern const char kOnCommitted[];
+extern const char kOnCompleted[];
+extern const char kOnDOMContentLoaded[];
+extern const char kOnErrorOccurred[];
+
+}  // namespace extension_web_navigation_api_constants
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_NAVIGATION_API_CONSTANTS_H_