CSSSegmentedFontFaceCache should not know about Document.

Source/core/css/CSSFontFace.h

Index: Source/core/css/CSSFontFace.h
diff --git a/Source/core/css/CSSFontFace.h b/Source/core/css/CSSFontFace.h
index e3432e5fb134c9161229e488b2b2e0bc55f36071..9a1ff51e24e3a19357e43d29d6e7cda9a5445dd3 100644
--- a/Source/core/css/CSSFontFace.h
+++ b/Source/core/css/CSSFontFace.h
@@ -36,13 +36,16 @@
 namespace WebCore {
 
 class CSSSegmentedFontFace;
+class Document;
 class FontDescription;
 class SimpleFontData;
+class StyleRuleFontFace;
 
 // FIXME: Can this be a subclass of FontFace?
 class CSSFontFace : public RefCounted<CSSFontFace> {
 public:
     static PassRefPtr<CSSFontFace> create(PassRefPtr<FontFace> fontFace) { return adoptRef(new CSSFontFace(fontFace)); }
+    static PassRefPtr<CSSFontFace> createFromStyleRule(Document*, const StyleRuleFontFace*);
 
     class UnicodeRangeSet;