content: Cleanup class/struct forward declarations

content/browser/speech/speech_recognition_dispatcher_host.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_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_DISPATCHER_HOST_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "content/public/browser/speech_recognition_event_listener.h"
 #include "net/url_request/url_request_context_getter.h"
 
 struct SpeechRecognitionHostMsg_StartRequest_Params;
 
 namespace content {
 
 class SpeechRecognitionManager;
-struct SpeechRecognitionResult;
 
 // SpeechRecognitionDispatcherHost is a delegate for Speech API messages used by
 // RenderMessageFilter. Basically it acts as a proxy, relaying the events coming
 // from the SpeechRecognitionManager to IPC messages (and vice versa).
 // It's the complement of SpeechRecognitionDispatcher (owned by RenderView).
 class CONTENT_EXPORT SpeechRecognitionDispatcherHost
     : public BrowserMessageFilter,
       public SpeechRecognitionEventListener {
  public:
   SpeechRecognitionDispatcherHost(
@@ skipping 51 matching lines @@
   // about this class being destroyed in the meanwhile (due to browser shutdown)
   // since tasks pending on a destroyed WeakPtr are automatically discarded.
   base::WeakPtrFactory<SpeechRecognitionDispatcherHost> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SpeechRecognitionDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_DISPATCHER_HOST_H_