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

src/pdf/SkPDFDevice.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPDFDevice_DEFINED
 #define SkPDFDevice_DEFINED
 
@@ skipping 126 matching lines @@
      *
      *  Currently if margin content is drawn and then a complex (for PDF) xfer
      *  mode is used, like SrcIn, Clear, etc, the margin content will get
      *  clipped. A simple way to avoid the bug is to always draw the margin
      *  content last.
      */
     void setDrawingArea(DrawingArea drawingArea);
 
     // 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.
      */
     const SkTDArray<SkPDFFont*>& getFontResources() const;
 
     /** Add our annotations (link to urls and destinations) to the supplied
      *  array.
      *  @param array Array to add annotations to.
      */
     void appendAnnotations(SkPDFArray* array) const;
 
     /** Add our named destinations to the supplied dictionary.
      *  @param dict  Dictionary to add destinations to.
      *  @param page  The PDF object representing the page for this device.
      */
     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.
+    /** Returns a copy of the media box for this device. */
+    sk_sp<SkPDFArray> copyMediaBox() const;
+
+    /** Returns a SkStream with the page contents.
      */
-    SkPDFArray* copyMediaBox() const;
-
-    /** Returns a SkStream with the page contents.  The caller is responsible
-     *  for a deleting the returned value.
-     */
-    SkStreamAsset* content() const;
+    skstd::unique_ptr<SkStreamAsset> content() const;
 
     /** Writes the page contents to the stream. */
     void writeContent(SkWStream*) const;
 
     const SkMatrix& initialTransform() const {
         return fInitialTransform;
     }
 
     /** Returns a SkPDFGlyphSetMap which represents glyph usage of every font
      *  that shows on this device.
@@ skipping 151 matching lines @@
 
     typedef SkBaseDevice INHERITED;
 
     // TODO(edisonn): Only SkDocument_PDF and SkPDFImageShader should be able to create
     // an SkPDFDevice
     //friend class SkDocument_PDF;
     //friend class SkPDFImageShader;
 };
 
 #endif