Make font-weight animatable.

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 1158 matching lines @@
     }
     return 0;
 }
 
 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(); }
 
 float RenderStyle::wordSpacing() const { return fontDescription().wordSpacing(); }
 float RenderStyle::letterSpacing() const { return fontDescription().letterSpacing(); }
 
 bool RenderStyle::setFontDescription(const FontDescription& v)
 {
     if (inherited->font.fontDescription() != v) {
         inherited.access()->font = Font(v);
         return true;
     }
@@ skipping 52 matching lines @@
     float multiplier = textAutosizingMultiplier();
     if (multiplier > 1) {
         float autosizedFontSize = TextAutosizer::computeAutosizedFontSize(size, multiplier);
         desc.setComputedSize(min(maximumAllowedFontSize, autosizedFontSize));
     }
 
     setFontDescription(desc);
     font().update(currentFontSelector);
 }
 
+void RenderStyle::setFontWeight(FontWeight weight)
+{
+    FontSelector* currentFontSelector = font().fontSelector();
+    FontDescription desc(fontDescription());
+    desc.setWeight(weight);
+    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 328 matching lines @@
 }
 
 void RenderStyle::setBorderImageOutset(const BorderImageLengthBox& outset)
 {
     if (surround->border.m_image.outset() == outset)
         return;
     surround.access()->border.m_image.setOutset(outset);
 }
 
 } // namespace WebCore