Remove some unused WebRange functions

public/web/WebRange.h

 /*
  * Copyright (C) 2009 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
@@ skipping 44 matching lines @@
         return *this;
     }
 
     BLINK_EXPORT void reset();
     BLINK_EXPORT void assign(const WebRange&);
 
     bool isNull() const { return m_private.isNull(); }
 
     BLINK_EXPORT int startOffset() const;
     BLINK_EXPORT int endOffset() const;
-    BLINK_EXPORT WebNode startContainer(int& exceptionCode) const;
-    BLINK_EXPORT WebNode endContainer(int& exceptionCode) const;
-
-    BLINK_EXPORT WebString toHTMLText() const;
     BLINK_EXPORT WebString toPlainText() const;
 
-    BLINK_EXPORT WebRange expandedToParagraph() const;
-
     BLINK_EXPORT static WebRange fromDocumentRange(WebLocalFrame*, int start, int length);
 
 #if BLINK_IMPLEMENTATION
     WebRange(const PassRefPtrWillBeRawPtr<Range>&);
     operator PassRefPtrWillBeRawPtr<Range>() const;
 #endif
 
 private:
     WebPrivatePtr<Range> m_private;
 };
 
 } // namespace blink
 
 #endif