Make sp variants for SkData

src/images/SkImageDecoder_pkm.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorPriv.h"
 #include "SkData.h"
 #include "SkImageDecoder.h"
@@ skipping 16 matching lines @@
 protected:
     Result onDecode(SkStream* stream, SkBitmap* bm, Mode) override;
 
 private:
     typedef SkImageDecoder INHERITED;
 };
 
 /////////////////////////////////////////////////////////////////////////////////////////
 
 SkImageDecoder::Result SkPKMImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
-    SkAutoTUnref<SkData> data(SkCopyStreamToData(stream));
+    sk_sp<SkData> data(SkCopyStreamToData(stream));
     if (!data || !data->size()) {
         return kFailure;
     }
 
     unsigned char* buf = (unsigned char*) data->data();
 
     // Make sure original PKM header is there...
     SkASSERT(etc1_pkm_is_valid(buf));
 
     const unsigned short width = etc1_pkm_get_width(buf);
@@ skipping 71 matching lines @@
 static SkImageDecoder_DecodeReg gReg(sk_libpkm_dfactory);
 
 static SkImageDecoder::Format get_format_pkm(SkStreamRewindable* stream) {
     if (is_pkm(stream)) {
         return SkImageDecoder::kPKM_Format;
     }
     return SkImageDecoder::kUnknown_Format;
 }
 
 static SkImageDecoder_FormatReg gFormatReg(get_format_pkm);