chrome: Cleanup class/struct forward declarations

chrome/browser/safe_browsing/ping_manager.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 CHROME_BROWSER_SAFE_BROWSING_PING_MANAGER_H_
 #define CHROME_BROWSER_SAFE_BROWSING_PING_MANAGER_H_
 
 // A class that reports safebrowsing statistics to Google's SafeBrowsing
 // servers.
 #include <memory>
@@ skipping 10 matching lines @@
 #include "content/public/browser/permission_type.h"
 #include "net/log/net_log_with_source.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "url/gurl.h"
 
 namespace certificate_reporting {
 class ErrorReporter;
 }
 
 namespace net {
-class SSLInfo;
 class URLRequestContextGetter;
 }  // namespace net
 
 namespace safe_browsing {
 
 class PermissionReporter;
 
 class SafeBrowsingPingManager : public net::URLFetcherDelegate {
  public:
   ~SafeBrowsingPingManager() override;
@@ skipping 78 matching lines @@
   std::unique_ptr<PermissionReporter> permission_reporter_;
 
   net::NetLogWithSource net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingPingManager);
 };
 
 }  // namespace safe_browsing
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_PING_MANAGER_H_