Make SkStream *not* ref counted.

experimental/PdfViewer/pdfparser/native/SkPdfNativeDoc.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPdfNativeDoc_DEFINED
 #define SkPdfNativeDoc_DEFINED
 
@@ skipping 51 matching lines @@
         // Used to break a recursive reference to itself.
         bool fIsReferenceResolved;
     };
 
 public:
     // TODO(edisonn) should be deprecated
     SkPdfNativeDoc(const char* path);
 
     // TODO(edisonn) should be deprecated
     // FIXME: Untested.
+    // Does not affect ownership of stream.
     SkPdfNativeDoc(SkStream* stream);
 
     ~SkPdfNativeDoc();
 
     // returns the number of pages in the pdf
     int pages() const;
 
     // returns the page resources
     SkPdfResourceDictionary* pageResources(int page);
 
@@ skipping 68 matching lines @@
     const unsigned char* fFileContent;
     size_t fContentLength;
     SkPdfNativeObject* fRootCatalogRef;
     SkPdfCatalogDictionary* fRootCatalog;
 
     mutable SkTDArray<PublicObjectEntry> fObjects;
     SkTDArray<SkPdfPageObjectDictionary*> fPages;
 };
 
 #endif  // SkPdfNativeDoc_DEFINED