Do not typedef ExtensionId/ID, since it's already available in extension_id.h

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;
 }
@@ skipping 138 matching lines @@
 
   // Map that tells us which WebRequestRule may match under the condition that
   // the URLMatcherConditionSet::ID was returned by the |url_matcher_|.
   RuleTriggers rule_triggers_;
 
   // These rules contain condition sets with conditions without URL attributes.
   // Such conditions are not triggered by URL matcher, so we need to test them
   // separately.
   std::set<const WebRequestRule*> rules_with_untriggered_conditions_;
 
-  std::map<WebRequestRule::ExtensionId, RulesMap> webrequest_rules_;
+  std::map<ExtensionId, RulesMap> webrequest_rules_;
 
   url_matcher::URLMatcher url_matcher_;
 
   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_