net: Cleanup class/struct forward declarations

net/extras/sqlite/sqlite_channel_id_store.h

 // Copyright 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 NET_EXTRAS_SQLITE_SQLITE_CHANNEL_ID_STORE_H_
 #define NET_EXTRAS_SQLITE_SQLITE_CHANNEL_ID_STORE_H_
 
 #include <list>
 #include <string>
 
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "net/ssl/default_channel_id_store.h"
 
 namespace base {
 class FilePath;
 class SequencedTaskRunner;
 }
 
-class GURL;
-
 namespace net {
 
 // Implements the DefaultChannelIDStore::PersistentStore interface
 // in terms of a SQLite database. For documentation about the actual member
 // functions consult the documentation of the parent class
 // DefaultChannelIDStore::PersistentCertStore.
 class SQLiteChannelIDStore : public DefaultChannelIDStore::PersistentStore {
  public:
   // Create or open persistent store in file |path|. All I/O tasks are performed
   // in background using |background_task_runner|.
@@ skipping 18 matching lines @@
   class Backend;
 
   scoped_refptr<Backend> backend_;
 
   DISALLOW_COPY_AND_ASSIGN(SQLiteChannelIDStore);
 };
 
 }  // namespace net
 
 #endif  // NET_EXTRAS_SQLITE_SQLITE_CHANNEL_ID_STORE_H_