chrome: Cleanup class/struct forward declarations

chrome/browser/chromeos/system_logs/debug_daemon_log_source.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_CHROMEOS_SYSTEM_LOGS_DEBUG_DAEMON_LOG_SOURCE_H_
 #define CHROME_BROWSER_CHROMEOS_SYSTEM_LOGS_DEBUG_DAEMON_LOG_SOURCE_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/feedback/system_logs/system_logs_fetcher_base.h"
 
-class Profile;
-
 namespace system_logs {
 
 // Gathers log data from Debug Daemon.
 class DebugDaemonLogSource : public SystemLogsSource {
  public:
   explicit DebugDaemonLogSource(bool scrub);
   ~DebugDaemonLogSource() override;
 
   // SystemLogsSource override:
   // Fetches logs from the daemon over dbus. After the fetch is complete, the
@@ skipping 34 matching lines @@
   bool scrub_;
   base::WeakPtrFactory<DebugDaemonLogSource> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DebugDaemonLogSource);
 };
 
 
 }  // namespace system_logs
 
 #endif  // CHROME_BROWSER_CHROMEOS_SYSTEM_LOGS_DEBUG_DAEMON_LOG_SOURCE_H_