Destroy SkScanlineDecoder in the SkCodec subclass destructors

include/codec/SkCodec.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkCodec_DEFINED
 #define SkCodec_DEFINED
 
@@ skipping 159 matching lines @@
 
     /*
      *
      * Get method for the input stream
      *
      */
     SkStream* stream() {
         return fStream.get();
     }
 
+    /*
+     *
+     * Get method for the scanline decoder

[reed1, 2015/06/29 21:21:49]

nit: lets have the comment be slightly more useful, or eliminate it.

e.g.

/* If the codec has a scanline decoder, return it (no ownership change occurs)
else return NULL.
   The returned decoder is only valid until ...
*/

[msarett, 2015/06/29 21:59:43]

Done.

+     *
+     */
+    SkScanlineDecoder* scanlineDecoder() {
+        return fScanlineDecoder.get();
+    }
+
 private:
     SkAutoTDelete<SkStream>             fStream;
     bool                                fNeedsRewind;
     SkAutoTDelete<SkScanlineDecoder>    fScanlineDecoder;
 
     typedef SkImageGenerator INHERITED;
 };
 #endif // SkCodec_DEFINED