net: Cleanup class/struct forward declarations

net/quic/core/crypto/quic_server_info.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_QUIC_CRYPTO_QUIC_SERVER_INFO_H_
 #define NET_QUIC_CRYPTO_QUIC_SERVER_INFO_H_
 
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
 #include "net/quic/core/quic_server_id.h"
 
 namespace net {
 
-class X509Certificate;
-
 // QuicServerInfo is an interface for fetching information about a QUIC server.
 // This information may be stored on disk so does not include keys or other
 // sensitive information. Primarily it's intended for caching the QUIC server's
 // crypto config.
 class NET_EXPORT_PRIVATE QuicServerInfo {
  public:
   // Enum to track number of times data read/parse/write API calls of
   // QuicServerInfo to and from disk cache is called.
   enum QuicServerInfoAPICall {
     QUIC_SERVER_INFO_START = 0,
@@ skipping 139 matching lines @@
   // |server_id| or NULL on failure.
   virtual QuicServerInfo* GetForServer(const QuicServerId& server_id) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(QuicServerInfoFactory);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_QUIC_SERVER_INFO_H_