change SkStreams to work with sk_sp<SkData> instead of SkData*

tools/visualize_color_gamut.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Resources.h"
 
 #include "SkBitmap.h"
@@ skipping 106 matching lines @@
     if (!input || !output) {
         SkCommandLineFlags::PrintUsage();
         return -1;
     }
 
     sk_sp<SkData> data(SkData::MakeFromFileName(input));
     if (!data) {
         SkDebugf("Cannot find input image.\n");
         return -1;
     }
-    SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(data.get()));
+    SkAutoTDelete<SkCodec> codec(SkCodec::NewFromData(data));
     if (!codec) {
         SkDebugf("Invalid input image.\n");
         return -1;
     }
 
     // Load a graph of the CIE XYZ color gamut.
     SkBitmap gamut;
     if (!GetResourceAsBitmap("gamut.png", &gamut)) {
         SkDebugf("Program failure.\n");
         return -1;
@@ skipping 54 matching lines @@
         SkFILEWStream bitmapStream(FLAGS_uncorrected[0]);
         result = bitmapStream.write(out->data(), out->size());
         if (!result) {
             SkDebugf("Failed to write uncorrected image output.\n");
             return -1;
         }
     }
 
     return 0;
 }