[PDF] Fix printing crashes caused by font streams that don't support getMemoryBase().

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
 #define SkPDFStream_DEFINED
 
 #include "SkPDFTypes.h"
 #include "SkRefCnt.h"
 #include "SkStream.h"
 #include "SkTemplates.h"
 
 class SkPDFCatalog;
 
 /** \class SkPDFStream
 
     A stream object in a PDF.  Note, all streams must be indirect objects (via
     SkObjRef).
+    TODO(vandebo): SkStream should be replaced by SkStreamRewindable when that
+    is feasible.
 */
 class SkPDFStream : public SkPDFDict {
 public:
     /** Create a PDF stream. A Length entry is automatically added to the
      *  stream dictionary. The stream may be retained (stream->ref() may be
      *  called) so its contents must not be changed after calling this.
      *  @param data  The data part of the stream.
      */
     explicit SkPDFStream(SkData* data);
     /** Deprecated constructor. */
@@ skipping 54 matching lines @@
     State fState;
 
     // TODO(vandebo): Use SkData (after removing deprecated constructor).
     SkAutoTUnref<SkStream> fData;
     SkAutoTUnref<SkPDFStream> fSubstitute;
 
     typedef SkPDFDict INHERITED;
 };
 
 #endif