Adding WebFallbackFont and renaming SimpleFontFamily

public/platform/linux/WebFallbackFont.h

Index: public/platform/linux/WebFallbackFont.h
diff --git a/public/platform/linux/WebFontFamily.h b/public/platform/linux/WebFallbackFont.h
similarity index 92%
copy from public/platform/linux/WebFontFamily.h
copy to public/platform/linux/WebFallbackFont.h
index bec7eb47c80386bfa0b5a15e37795451888566ff..654acc2bbe8b7f8514e565fc7de486130790970a 100644
--- a/public/platform/linux/WebFontFamily.h
+++ b/public/platform/linux/WebFallbackFont.h
@@ -28,20 +28,22 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef WebFontFamily_h
-#define WebFontFamily_h
+#ifndef WebFallbackFont_h
+#define WebFallbackFont_h
 
 #include "../WebCString.h"
 #include "../WebCommon.h"
 
 namespace blink {
 
-struct WebFontFamily {
+struct WebFallbackFont {
     WebCString name;
+    WebCString filename;
+    int ttcIndex;
     bool isBold;
     bool isItalic;
 };
 
 } // namespace blink
 
-#endif // WebFontFamily_h
+#endif // WebFallbackFont_h