Remove virtual destructors for several graphics classes

Source/core/platform/graphics/harfbuzz/HarfBuzzShaper.cpp

 /*
  * 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
@@ skipping 349 matching lines @@
     , m_letterSpacing(font->letterSpacing())
     , m_fromIndex(0)
     , m_toIndex(m_run.length())
 {
     m_normalizedBuffer = adoptArrayPtr(new UChar[m_run.length() + 1]);
     normalizeCharacters(m_run, m_run.length(), m_normalizedBuffer.get(), &m_normalizedBufferLength);
     setPadding(m_run.expansion());
     setFontFeatures();
 }
 
-HarfBuzzShaper::~HarfBuzzShaper()
-{
-}
-
 static void normalizeSpacesAndMirrorChars(const UChar* source, unsigned length, UChar* destination, unsigned* destinationLength, HarfBuzzShaper::NormalizeMode normalizeMode)
 {
     int position = 0;
     bool error = false;
     // Iterate characters in source and mirror character if needed.
     *destinationLength = 0;
     while (position < length) {
         UChar32 character;
         U16_NEXT(source, position, length, character);
         // Don't normalize tabs as they are not treated as spaces for word-end
@@ skipping 484 matching lines @@
     if (!foundToX)
         toX = m_run.rtl() ? 0 : m_totalWidth;
 
     // Using floorf() and roundf() as the same as mac port.
     if (fromX < toX)
         return FloatRect(floorf(point.x() + fromX), point.y(), roundf(toX - fromX), height);
     return FloatRect(floorf(point.x() + toX), point.y(), roundf(fromX - toX), height);
 }
 
 } // namespace WebCore