content: Cleanup class/struct forward declarations

content/browser/net/quota_policy_cookie_store.h

 // Copyright 2015 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 CONTENT_BROWSER_NET_QUOTA_POLICY_COOKIE_STORE_H_
 #define CONTENT_BROWSER_NET_QUOTA_POLICY_COOKIE_STORE_H_
 
 #include <stddef.h>
 
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 #include "net/cookies/cookie_monster.h"
 #include "net/extras/sqlite/sqlite_persistent_cookie_store.h"
 
-class Task;
-
 namespace net {
 class CanonicalCookie;
 }  // namespace net
 
 namespace storage {
 class SpecialStoragePolicy;
 }  // namespace storage
 
 namespace content {
 
@@ skipping 37 matching lines @@
 
   scoped_refptr<storage::SpecialStoragePolicy> special_storage_policy_;
   scoped_refptr<net::SQLitePersistentCookieStore> persistent_store_;
 
   DISALLOW_COPY_AND_ASSIGN(QuotaPolicyCookieStore);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_NET_QUOTA_POLICY_COOKIE_STORE_H_