Make SkStream *not* ref counted.

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 124 matching lines @@
 
 HRESULT SkDWriteFontFileStreamWrapper::Create(SkStream* stream, SkDWriteFontFileStreamWrapper** streamFontFileStream) {
     *streamFontFileStream = new SkDWriteFontFileStreamWrapper(stream);
     if (NULL == streamFontFileStream) {
         return E_OUTOFMEMORY;
     }
     return S_OK;
 }
 
 SkDWriteFontFileStreamWrapper::SkDWriteFontFileStreamWrapper(SkStream* stream)
-    : fRefCount(1), fStream(SkRef(stream)) {
+    : fRefCount(1), fStream(stream) {
 }
 
 HRESULT STDMETHODCALLTYPE SkDWriteFontFileStreamWrapper::QueryInterface(REFIID iid, void** ppvObject) {
     if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontFileStream)) {
         *ppvObject = this;
         AddRef();
         return S_OK;
     } else {
         *ppvObject = NULL;
         return E_NOINTERFACE;
@@ skipping 67 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;
 }