SkPDF: SkPDFStream takes a unique_ptr

src/pdf/SkPDFFormXObject.h

Index: src/pdf/SkPDFFormXObject.h
diff --git a/src/pdf/SkPDFFormXObject.h b/src/pdf/SkPDFFormXObject.h
index f739a36d200d38184ae4dee4b9ab2386387e0656..a483a6046657387cc6f7096dc04c70405d5f9e5a 100644
--- a/src/pdf/SkPDFFormXObject.h
+++ b/src/pdf/SkPDFFormXObject.h
@@ -37,7 +37,7 @@ public:
      * Create a PDF form XObject from a raw content stream and associated
      * resources.
      */
-    explicit SkPDFFormXObject(SkStreamAsset* content,
+    explicit SkPDFFormXObject(std::unique_ptr<SkStreamAsset> content,
                               SkRect bbox,
                               SkPDFDict* resourceDict);
     virtual ~SkPDFFormXObject();