net: Cleanup class/struct forward declarations

net/cert/ct_verifier.h

 // Copyright 2013 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_CERT_CT_VERIFIER_H_
 #define NET_CERT_CT_VERIFIER_H_
 
 #include <string>
 
 #include "net/base/net_export.h"
 #include "net/cert/signed_certificate_timestamp_and_status.h"
 
 namespace net {
 
-class CTLogVerifier;
 class NetLogWithSource;
 class X509Certificate;
 
 // Interface for verifying Signed Certificate Timestamps over a certificate.
 class NET_EXPORT CTVerifier {
  public:
   class NET_EXPORT Observer {
    public:
     // Called for each Signed Certificate Timestamp from a known log that vas
     // verified successfully (i.e. the signature verifies). |sct| is the
@@ skipping 30 matching lines @@
   // Registers |observer| to receive notifications of validated SCTs. Does not
   // take ownership of the observer as the observer may be performing
   // URLRequests which have to be cancelled before this object is destroyed.
   // Setting |observer| to nullptr has the effect of stopping all notifications.
   virtual void SetObserver(Observer* observer) = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_CERT_CT_VERIFIER_H_