Make sp variants for SkData

src/images/SkImageDecoder_libico.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * 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 55 matching lines @@
     //  In the case of a 4 bit image with an odd width, we need to add some
     //  so we can go off the end of the drawn bitmap.
     //  Add 4 to ensure that it is still a multiple of 4.
     if (4 == bitCount && (w & 0x1)) {
         return (w + 1) << 2;
     }
     //  Otherwise return 0, which will allow it to be calculated automatically.
     return 0;
 }
 
-SkImageDecoder::Result SkICOImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode)
-{
-    SkAutoTUnref<SkData> data(SkCopyStreamToData(stream));
+SkImageDecoder::Result SkICOImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
+    auto data = SkCopyStreamToData(stream);
     if (!data) {
         return kFailure;
     }
 
     const size_t length = data->size();
     // Check that the buffer is large enough to read the directory header
     if (length < 6) {
         return kFailure;
     }
 
@@ skipping 359 matching lines @@
 static SkImageDecoder_DecodeReg gReg(sk_libico_dfactory);
 
 static SkImageDecoder::Format get_format_ico(SkStreamRewindable* stream) {
     if (is_ico(stream)) {
         return SkImageDecoder::kICO_Format;
     }
     return SkImageDecoder::kUnknown_Format;
 }
 
 static SkImageDecoder_FormatReg gFormatReg(get_format_ico);