Remove unused linked_ptr inclusion

extensions/browser/api/declarative_webrequest/webrequest_condition.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_CONDITION_H_
 #define EXTENSIONS_BROWSER_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_CONDITION_H_
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "components/url_matcher/url_matcher.h"
 #include "extensions/browser/api/declarative/declarative_rule.h"
 #include "extensions/browser/api/declarative_webrequest/webrequest_condition_attribute.h"
 #include "net/http/http_response_headers.h"
 
 namespace net {
 class URLRequest;
 }
 
 namespace extensions {
@@ skipping 91 matching lines @@
   int applicable_request_stages_;
 
   DISALLOW_COPY_AND_ASSIGN(WebRequestCondition);
 };
 
 typedef DeclarativeConditionSet<WebRequestCondition> WebRequestConditionSet;
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_CONDITION_H_