Clean forward declaration in public

public/web/WebSurroundingText.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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 15 matching lines @@
 #define WebSurroundingText_h
 
 #include "../platform/WebPrivateOwnPtr.h"
 #include "../platform/WebString.h"
 #include "WebNode.h"
 #include "WebRange.h"
 
 namespace blink {
 
 class SurroundingText;
-class WebHitTestResult;
 class WebNode;
 class WebRange;
 struct WebPoint;
 
 // WebSurroundingText is a Blink API that gives access to the SurroundingText
 // API. It allows caller to know the text surrounding a point or a range.
 class WebSurroundingText {
 public:
     WebSurroundingText() { }
     ~WebSurroundingText() { reset(); }
@@ skipping 31 matching lines @@
     // range.
     BLINK_EXPORT WebRange rangeFromContentOffsets(size_t startOffsetInContent, size_t endOffsetInContent);
 
 protected:
     WebPrivateOwnPtr<SurroundingText> m_private;
 };
 
 } // namespace blink
 
 #endif