Switch SkPDFStream's internal storage from SkStream to SkData

src/pdf/SkPDFImage.cpp

Index: src/pdf/SkPDFImage.cpp
diff --git a/src/pdf/SkPDFImage.cpp b/src/pdf/SkPDFImage.cpp
index 77fd84eff94d0be5911f5bc67232d81fafe42453..5a280c20b927dfb845bba5e06887ca8d974d337b 100644
--- a/src/pdf/SkPDFImage.cpp
+++ b/src/pdf/SkPDFImage.cpp
@@ -598,13 +598,11 @@ bool SkPDFImage::populate(SkPDFCatalog* catalog) {
             SkAutoTUnref<SkData> data(fEncoder(&pixelRefOffset, subset));
             if (data.get() && data->size() < get_uncompressed_size(fBitmap,
                                                                    fSrcRect)) {
-                SkAutoTUnref<SkStream> stream(SkNEW_ARGS(SkMemoryStream,
-                                                         (data)));
-                setData(stream.get());
+                setData(data.get());
 
                 insertName("Filter", "DCTDecode");
                 insertInt("ColorTransform", kNoColorTransform);
-                insertInt("Length", getData()->getLength());
+                insertInt("Length", this->dataSize());
                 setState(kCompressed_State);
                 return true;
             }