pdfviewer: add --pages arg: render a certain page (all, all in desceding order, firsl, last and by page number)

Review URL: https://codereview.chromium.org/18584010

git-svn-id: http://skia.googlecode.com/svn/trunk@9999 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/PdfViewer/pdfparser/native/SkNativeParsedPDF.h b/experimental/PdfViewer/pdfparser/native/SkNativeParsedPDF.h
index 48442fd..b91d574 100644
--- a/experimental/PdfViewer/pdfparser/native/SkNativeParsedPDF.h
+++ b/experimental/PdfViewer/pdfparser/native/SkNativeParsedPDF.h
@@ -62,7 +62,7 @@
     SkPdfObject* resolveReference(const SkPdfObject* ref);
 
     // Reports an approximation of all the memory usage.
-    size_t bytesUsed();
+    size_t bytesUsed() const;
 
 private: