Remove staging SkStream::unref().

src/utils/win/SkDWriteFontFileStream.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTypes.h"
 #include "SkDWriteFontFileStream.h"
 #include "SkHRESULT.h"
@@ skipping 85 matching lines @@
     size_t length = this->getLength();
     fPos = (position > length) ? length : position;
     return true;
 }
 
 bool SkDWriteFontFileStream::move(long offset) {
     return seek(fPos + offset);
 }
 
 SkDWriteFontFileStream* SkDWriteFontFileStream::fork() const {
-    SkAutoTUnref<SkDWriteFontFileStream> that(this->duplicate());
+    SkAutoTDelete<SkDWriteFontFileStream> that(this->duplicate());
     that->seek(fPos);
     return that.detach();
 }
 
 size_t SkDWriteFontFileStream::getLength() const {
     HRESULT hr = S_OK;
     UINT64 realFileSize = 0;
     hr = fFontFileStream->GetFileSize(&realFileSize);
     if (!SkTFitsIn<size_t>(realFileSize)) {
         return 0;
@@ skipping 106 matching lines @@
 HRESULT STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::GetFileSize(UINT64* fileSize) {
     *fileSize = fStream->getLength();
     return S_OK;
 }
 
 HRESULT STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::GetLastWriteTime(UINT64* lastWriteTime) {
     // The concept of last write time does not apply to this loader.
     *lastWriteTime = 0;
     return E_NOTIMPL;
 }