Trim FontSelector interface a bit.

Source/core/css/CSSFontSelectorClient.h

Index: Source/core/css/CSSFontSelectorClient.h
diff --git a/Source/core/svg/SVGAnimatedLengthList.h b/Source/core/css/CSSFontSelectorClient.h
similarity index 86%
copy from Source/core/svg/SVGAnimatedLengthList.h
copy to Source/core/css/CSSFontSelectorClient.h
index 8b4f5f11713fd7671bb238493dd7462510445e5b..28a6c87742256f5224d530dc9d9110cf48f0a86e 100644
--- a/Source/core/svg/SVGAnimatedLengthList.h
+++ b/Source/core/css/CSSFontSelectorClient.h
@@ -28,16 +28,20 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef SVGAnimatedLengthList_h
-#define SVGAnimatedLengthList_h
-
-#include "core/svg/SVGLengthListTearOff.h"
-#include "core/svg/properties/NewSVGAnimatedProperty.h"
+#ifndef CSSFontSelectorClient_h
+#define CSSFontSelectorClient_h
 
 namespace WebCore {
 
-typedef NewSVGAnimatedProperty<SVGLengthList> SVGAnimatedLengthList;
+class CSSFontSelector;
+
+class CSSFontSelectorClient {
+public:
+    virtual ~CSSFontSelectorClient() { }
+
+    virtual void fontsNeedUpdate(CSSFontSelector*) = 0;
+};
 
 } // namespace WebCore
 
-#endif
+#endif // CSSFontSelectorClient_h