content: Cleanup class/struct forward declarations

content/browser/speech/speech_recognition_engine.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_SPEECH_SPEECH_RECOGNITION_ENGINE_H_
 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_
 
 #include <stdint.h>
 #include <memory>
 #include <string>
@@ skipping 12 matching lines @@
 #include "net/url_request/url_fetcher_delegate.h"
 
 namespace net {
 class URLRequestContextGetter;
 }
 
 namespace content {
 
 class AudioChunk;
 struct SpeechRecognitionError;
-struct SpeechRecognitionResult;
 
 // A speech recognition engine supporting continuous recognition by means of
 // interaction with the Google streaming speech recognition webservice.
 //
 // This class establishes two HTTPS connections with the webservice for each
 // session, herein called "upstream" and "downstream". Audio chunks are sent on
 // the upstream by means of a chunked HTTP POST upload. Recognition results are
 // retrieved in a full-duplex fashion (i.e. while pushing audio on the upstream)
 // on the downstream by means of a chunked HTTP GET request. Pairing between the
 // two stream is handled through a randomly generated key, unique for each
@@ skipping 172 matching lines @@
   bool is_dispatching_event_;
   bool use_framed_post_data_;
   FSMState state_;
 
   DISALLOW_COPY_AND_ASSIGN(SpeechRecognitionEngine);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_