Add plumbing for font-stretch

Source/core/rendering/style/RenderStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
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 void RenderStyle::setFontWeight(FontWeight weight)
 {
     FontSelector* currentFontSelector = font().fontSelector();
     FontDescription desc(fontDescription());
     desc.setWeight(weight);
     setFontDescription(desc);
     font().update(currentFontSelector);
 }
 
+void RenderStyle::setFontStretch(FontStretch stretch)
+{
+    FontSelector* currentFontSelector = font().fontSelector();
+    FontDescription desc(fontDescription());
+    desc.setStretch(stretch);
+    setFontDescription(desc);
+    font().update(currentFontSelector);
+}
+
 void RenderStyle::getShadowExtent(const ShadowList* shadowList, LayoutUnit &top, LayoutUnit &right, LayoutUnit &bottom, LayoutUnit &left) const
 {
     top = 0;
     right = 0;
     bottom = 0;
     left = 0;
 
     size_t shadowCount = shadowList ? shadowList->shadows().size() : 0;
     for (size_t i = 0; i < shadowCount; ++i) {
         const ShadowData& shadow = shadowList->shadows()[i];
@@ skipping 360 matching lines @@
     // right
     radiiSum = radii.topRight().height() + radii.bottomRight().height();
     if (radiiSum > rect.height())
         factor = std::min(rect.height() / radiiSum, factor);
 
     ASSERT(factor <= 1);
     return factor;
 }
 
 } // namespace WebCore