components: Cleanup class/struct fwd declarations

components/rlz/rlz_tracker.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 COMPONENTS_RLZ_RLZ_TRACKER_H_
 #define COMPONENTS_RLZ_RLZ_TRACKER_H_
 
 #include <map>
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/singleton.h"
 #include "base/strings/string16.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "rlz/lib/rlz_lib.h"
 
-namespace net {
-class URLRequestContextGetter;
-}
-
 namespace rlz {
 
 class RLZTrackerDelegate;
 
 // RLZ is a library which is used to measure distribution scenarios.
 // Its job is to record certain lifetime events in the registry and to send
 // them encoded as a compact string at most twice. The sent data does
 // not contain information that can be used to identify a user or to infer
 // browsing habits. The API in this file is a wrapper around the open source
 // RLZ library which can be found at http://code.google.com/p/rlz.
@@ skipping 200 matching lines @@
 
   // Minimum delay before sending financial ping after initialization.
   base::TimeDelta min_init_delay_;
 
   DISALLOW_COPY_AND_ASSIGN(RLZTracker);
 };
 
 }  // namespace rlz
 
 #endif  // COMPONENTS_RLZ_RLZ_TRACKER_H_