pdfviewer: more plumming for soft masks, blend modes and transparency groups

Review URL: https://codereview.chromium.org/21125002

git-svn-id: http://skia.googlecode.com/svn/trunk@10419 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/PdfViewer/SkPdfFont.cpp b/experimental/PdfViewer/SkPdfFont.cpp
index 0a8420c..ac96f02 100644
--- a/experimental/PdfViewer/SkPdfFont.cpp
+++ b/experimental/PdfViewer/SkPdfFont.cpp
@@ -308,7 +308,7 @@
 static int skstoi(const SkPdfObject* str) {
     // TODO(edisonn): report err of it is not a (hex) string
     int ret = 0;
-    for (unsigned int i = 0 ; i < str->len(); i++) {
+    for (unsigned int i = 0 ; i < str->lenstr(); i++) {
         ret = (ret << 8) + ((unsigned char*)str->c_str())[i];
     }
     // TODO(edisonn): character larger than 0x0000ffff not supported right now.