Introduce WebRequestEventRouterDelegate.

extensions/browser/api/web_request/extra_request_params.h

+// Copyright (c) 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.
+
+#ifndef EXTENSIONS_BROWSER_API_WEB_REQUEST_EXTRA_REQUEST_PARAMS_H_
+#define EXTENSIONS_BROWSER_API_WEB_REQUEST_EXTRA_REQUEST_PARAMS_H_
+
+#include "base/values.h"
+
+namespace net {
+class URLRequest;
+}  // namespace net
+
+class ExtraRequestParams {
+ public:
+  ExtraRequestParams();
+  explicit ExtraRequestParams(const ExtraRequestParams& params);
+  virtual ~ExtraRequestParams();
+
+  virtual bool OnInitFromValueCheck(const base::DictionaryValue& value);
+
+  virtual bool OnGetMatchingListenersImplCheck(net::URLRequest* request) const;
+};
+
+#endif  //  EXTENSIONS_BROWSER_API_WEB_REQUEST_EXTRA_REQUEST_PARAMS_H_