Reland "Add plumbing for font-stretch"

Source/core/rendering/style/RenderStyle.cpp

Index: Source/core/rendering/style/RenderStyle.cpp
diff --git a/Source/core/rendering/style/RenderStyle.cpp b/Source/core/rendering/style/RenderStyle.cpp
index d89e8f6753fdc0e58afeeaa2c7cc5dd4aad2201b..2b8e3b49d73c33809e3407a1581ae56d6ce95998 100644
--- a/Source/core/rendering/style/RenderStyle.cpp
+++ b/Source/core/rendering/style/RenderStyle.cpp
@@ -1121,6 +1121,7 @@ float RenderStyle::specifiedFontSize() const { return fontDescription().specifie
 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
 {
@@ -1295,6 +1296,15 @@ void RenderStyle::clearAppliedTextDecorations()
         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;