Initial draft code to run pdfviewer withg gms

src/utils/SkPDFRasterizer.cpp

Index: src/utils/SkPDFRasterizer.cpp
diff --git a/src/utils/SkPDFRasterizer.cpp b/src/utils/SkPDFRasterizer.cpp
index a3b4cb4a53eef8015d5a6869ff60a9bbb7a7e96f..267c803ca5e92b041ce8b4e89e7f284411dabb7b 100644
--- a/src/utils/SkPDFRasterizer.cpp
+++ b/src/utils/SkPDFRasterizer.cpp
@@ -18,6 +18,7 @@
 
 #include "SkPDFRasterizer.h"
 #include "SkColorPriv.h"
+#include "SkPdfRenderer.h"
 
 bool SkPopplerRasterizePDF(SkStream* pdf, SkBitmap* output) {
   size_t size = pdf->getLength();
@@ -71,3 +72,7 @@ bool SkPopplerRasterizePDF(SkStream* pdf, SkBitmap* output) {
 
   return true;
 }
+
+bool SkNativeRasterizePDF(SkStream* pdf, SkBitmap* output) {
+    return SkPDFNativeRenderToBitmap(pdf, output);
+}