refactoring for pdf viewer lib

Review URL: https://codereview.chromium.org/17856004

git-svn-id: http://skia.googlecode.com/svn/trunk@9773 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/PdfViewer/SkPdfFont.h b/experimental/PdfViewer/SkPdfFont.h
index a3f0d36..85b9fc4 100644
--- a/experimental/PdfViewer/SkPdfFont.h
+++ b/experimental/PdfViewer/SkPdfFont.h
@@ -7,6 +7,7 @@
 #include <map>
 #include <string>
 
+#include "SkTypeface.h"
 #include "SkUtils.h"
 #include "SkPdfBasics.h"
 #include "SkPdfUtils.h"