SkPDF: Add sk_sp setters; .release() becomes std::move()

src/pdf/SkPDFDevice.h

Index: src/pdf/SkPDFDevice.h
diff --git a/src/pdf/SkPDFDevice.h b/src/pdf/SkPDFDevice.h
index 310807d86ec4e54c1525519c2e7959e9599cadc0..b1345a8e3fbb8e7c85069e62703d649486382d14 100644
--- a/src/pdf/SkPDFDevice.h
+++ b/src/pdf/SkPDFDevice.h
@@ -144,9 +144,8 @@ public:
 
     // PDF specific methods.
 
-    /** Create the resource dictionary for this device.
-     */
-    SkPDFDict* createResourceDict() const;
+    /** Create the resource dictionary for this device. */
+    sk_sp<SkPDFDict> makeResourceDict() const;
 
     /** Get the fonts used on this device.
      */
@@ -164,15 +163,12 @@ public:
      */
     void appendDestinations(SkPDFDict* dict, SkPDFObject* page) const;
 
-    /** Returns a copy of the media box for this device. The caller is required
-     *  to unref() this when it is finished.
-     */
-    SkPDFArray* copyMediaBox() const;
+    /** Returns a copy of the media box for this device. */
+    sk_sp<SkPDFArray> copyMediaBox() const;
 
-    /** Returns a SkStream with the page contents.  The caller is responsible
-     *  for a deleting the returned value.
+    /** Returns a SkStream with the page contents.
      */
-    SkStreamAsset* content() const;
+    skstd::unique_ptr<SkStreamAsset> content() const;
 
     /** Writes the page contents to the stream. */
     void writeContent(SkWStream*) const;