SkPDF s/SkAutoTDelete/std::unique_ptr/

src/pdf/SkPDFBitmap.cpp

Index: src/pdf/SkPDFBitmap.cpp
diff --git a/src/pdf/SkPDFBitmap.cpp b/src/pdf/SkPDFBitmap.cpp
index 24f5c6a00fc0d6a93311299d86ea8727dd1d1b3a..220d2b3e09f0dfde13ae0f5659273d4ef664c6d3 100644
--- a/src/pdf/SkPDFBitmap.cpp
+++ b/src/pdf/SkPDFBitmap.cpp
@@ -346,7 +346,7 @@ static void emit_image_xobject(SkWStream* stream,
         bitmap_to_pdf_pixels(bitmap, &deflateWStream);
     }
     deflateWStream.finalize();  // call before detachAsStream().
-    SkAutoTDelete<SkStreamAsset> asset(buffer.detachAsStream());
+    std::unique_ptr<SkStreamAsset> asset(buffer.detachAsStream());
 
     SkPDFDict pdfDict("XObject");
     pdfDict.insertName("Subtype", "Image");