Clean forward declaration in public

public/web/WebSpeechRecognitionHandle.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *  * Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  * Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 14 matching lines @@
 
 #ifndef WebSpeechRecognitionHandle_h
 #define WebSpeechRecognitionHandle_h
 
 #include "../platform/WebCommon.h"
 #include "../platform/WebPrivatePtr.h"
 
 namespace blink {
 
 class SpeechRecognition;
-class WebSpeechRecognitionResult;
-class WebString;
 
 // WebSpeechRecognitionHandle is used by WebSpeechRecognizer to identify a
 // recognition session, and by WebSpeechRecognizerClient to route
 // recognition events.
 class WebSpeechRecognitionHandle {
 public:
     ~WebSpeechRecognitionHandle() { reset(); }
     WebSpeechRecognitionHandle() { }
 
     WebSpeechRecognitionHandle(const WebSpeechRecognitionHandle& other) { assign(other); }
@@ skipping 31 matching lines @@
 }
 
 inline bool operator<(const WebSpeechRecognitionHandle& a, const WebSpeechRecognitionHandle& b)
 {
     return a.lessThan(b);
 }
 
 } // namespace blink
 
 #endif // WebSpeechRecognitionHandle_h