Make SkStream *not* ref counted.

src/pdf/SkPDFStream.h

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkPDFStream_DEFINED
@@ skipping 75 matching lines @@
         return fState;
     }
 
 private:
     // Indicates what form (or if) the stream has been requested.
     State fState;
 
     // Mutex guards fState, fDataStream, and fSubstitute in public interface.
     SkMutex fMutex;
 
-    SkMemoryStream fMemoryStream;  // Used by fDataStream when
-                                   // fDataStream needs to be backed
-                                   // by SkData.
-    SkAutoTUnref<SkStreamRewindable> fDataStream;
+    SkAutoTDelete<SkStreamRewindable> fDataStream;
     SkAutoTUnref<SkPDFStream> fSubstitute;
 
     typedef SkPDFDict INHERITED;
 };
 
 #endif