Reland "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.
  *
@@ skipping 1103 matching lines @@
     return *rareNonInheritedData->m_transitions;
 }
 
 const Font& RenderStyle::font() const { return inherited->font; }
 const FontMetrics& RenderStyle::fontMetrics() const { return inherited->font.fontMetrics(); }
 const FontDescription& RenderStyle::fontDescription() const { return inherited->font.fontDescription(); }
 float RenderStyle::specifiedFontSize() const { return fontDescription().specifiedSize(); }
 float RenderStyle::computedFontSize() const { return fontDescription().computedSize(); }
 int RenderStyle::fontSize() const { return fontDescription().computedPixelSize(); }
 FontWeight RenderStyle::fontWeight() const { return fontDescription().weight(); }
+FontStretch RenderStyle::fontStretch() const { return fontDescription().stretch(); }
 
 TextDecoration RenderStyle::textDecorationsInEffect() const
 {
     int decorations = 0;
 
     const Vector<AppliedTextDecoration>& applied = appliedTextDecorations();
 
     for (size_t i = 0; i < applied.size(); ++i)
         decorations |= applied[i].line();
 
@@ skipping 154 matching lines @@
 }
 
 void RenderStyle::clearAppliedTextDecorations()
 {
     inherited_flags.m_textUnderline = false;
 
     if (rareInheritedData->appliedTextDecorations)
         rareInheritedData.access()->appliedTextDecorations = nullptr;
 }
 
+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 379 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 blink