Make SkStream *not* ref counted.

src/utils/SkFrontBufferedStream.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkFrontBufferedStream.h"
 #include "SkStream.h"
 #include "SkTemplates.h"
@@ skipping 13 matching lines @@
 
     size_t getPosition() const SK_OVERRIDE { return fOffset; }
 
     bool hasLength() const SK_OVERRIDE { return fHasLength; }
 
     size_t getLength() const SK_OVERRIDE { return fLength; }
 
     SkStreamRewindable* duplicate() const SK_OVERRIDE { return NULL; }
 
 private:
-    SkAutoTUnref<SkStream>  fStream;
+    SkAutoTDelete<SkStream> fStream;
     const bool              fHasLength;
     const size_t            fLength;
     // Current offset into the stream. Always >= 0.
     size_t                  fOffset;
     // Amount that has been buffered by calls to read. Will always be less than
     // fBufferSize.
     size_t                  fBufferedSoFar;
     // Total size of the buffer.
     const size_t            fBufferSize;
     // FIXME: SkAutoTMalloc throws on failure. Instead, Create should return a
@@ skipping 19 matching lines @@
 };
 
 SkStreamRewindable* SkFrontBufferedStream::Create(SkStream* stream, size_t bufferSize) {
     if (NULL == stream) {
         return NULL;
     }
     return SkNEW_ARGS(FrontBufferedStream, (stream, bufferSize));
 }
 
 FrontBufferedStream::FrontBufferedStream(SkStream* stream, size_t bufferSize)
-    : fStream(SkRef(stream))
+    : fStream(stream)
     , fHasLength(stream->hasPosition() && stream->hasLength())
     , fLength(stream->getLength() - stream->getPosition())
     , fOffset(0)
     , fBufferedSoFar(0)
     , fBufferSize(bufferSize)
     , fBuffer(bufferSize) {}
 
 bool FrontBufferedStream::isAtEnd() const {
     if (fOffset < fBufferedSoFar) {
         // Even if the underlying stream is at the end, this stream has been
@@ skipping 104 matching lines @@
     }
 
     if (size > 0 && !fStream->isAtEnd()) {
         SkDEBUGCODE(const size_t bytesReadDirectly =) this->readDirectlyFromStream(dst, size);
         SkDEBUGCODE(size -= bytesReadDirectly;)
         SkASSERT(size + (fOffset - start) == totalSize);
     }
 
     return fOffset - start;
 }