content: Cleanup class/struct forward declarations

content/browser/ssl/ssl_error_handler.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 CONTENT_BROWSER_SSL_SSL_ERROR_HANDLER_H_
 #define CONTENT_BROWSER_SSL_SSL_ERROR_HANDLER_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/global_request_id.h"
 #include "content/public/common/resource_type.h"
 #include "net/ssl/ssl_info.h"
 #include "url/gurl.h"
 
 namespace net {
 class URLRequest;
 }  // namespace net
 
 namespace content {
 
-class ResourceDispatcherHostImpl;
-class SSLManager;
 class WebContents;
 
 // SSLErrorHandler is the UI-thread class for handling SSL certificate
 // errors. Users of this class can call CancelRequest(),
 // ContinueRequest(), or DenyRequest() when a decision about how to
 // handle the error has been made. Users of this class must
 // call exactly one of those methods exactly once.
 class SSLErrorHandler {
  public:
   // SSLErrorHandler's delegate lives on the IO thread, and thus these
@@ skipping 71 matching lines @@
 
   // The WebContents associated with the request that generated the error.
   WebContents* web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(SSLErrorHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SSL_SSL_ERROR_HANDLER_H_