extensions: Cleanup class/struct fwd declarations

extensions/browser/api/declarative_webrequest/webrequest_rules_registry.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 EXTENSIONS_BROWSER_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_RULES_REGISTRY_H_
 #define EXTENSIONS_BROWSER_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_RULES_REGISTRY_H_
 
 #include <list>
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "components/url_matcher/url_matcher.h"
 #include "extensions/browser/api/declarative/declarative_rule.h"
 #include "extensions/browser/api/declarative/rules_registry.h"
 #include "extensions/browser/api/declarative_webrequest/request_stage.h"
 #include "extensions/browser/api/declarative_webrequest/webrequest_action.h"
 #include "extensions/browser/api/declarative_webrequest/webrequest_condition.h"
 #include "extensions/browser/info_map.h"
 #include "extensions/common/extension_id.h"
 
-class WebRequestPermissions;
-
 namespace content {
 class BrowserContext;
 }
 
 namespace extension_web_request_api_helpers {
 struct EventResponseDelta;
 }
 
-namespace net {
-class URLRequest;
-}
-
 namespace extensions {
 
-class RulesRegistryService;
-
 typedef linked_ptr<extension_web_request_api_helpers::EventResponseDelta>
     LinkedPtrEventResponseDelta;
 typedef DeclarativeRule<WebRequestCondition, WebRequestAction> WebRequestRule;
 
 // The WebRequestRulesRegistry is responsible for managing
 // the internal representation of rules for the Declarative Web Request API.
 //
 // Here is the high level overview of this functionality:
 //
 // api::events::Rule consists of Conditions and Actions, these are
@@ skipping 132 matching lines @@
 
   content::BrowserContext* browser_context_;
   scoped_refptr<InfoMap> extension_info_map_;
 
   DISALLOW_COPY_AND_ASSIGN(WebRequestRulesRegistry);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_RULES_REGISTRY_H_