Make SkStream *not* ref counted.

experimental/PdfViewer/inc/SkPdfRenderer.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 SkPdfRenderer_DEFINED
 #define SkPdfRenderer_DEFINED
@@ skipping 17 matching lines @@
  *
  *  The SkPdfRenderer class is used to render a PDF into canvas.
  *
  */
 class SkPdfRenderer : SkNoncopyable {
 public:
     // Create a new renderer from a stream.
     // TODO(edisonn): replace it with a SkSmartStream which would know to to efficiently
     // deal with a HTTP stream.
     // FIXME: Untested.
+    // Does not affect ownership of SkStream.
     static SkPdfRenderer* CreateFromStream(SkStream*);
     // Create a new renderer from a file.
     static SkPdfRenderer* CreateFromFile(const char* filename);
 
     ~SkPdfRenderer();
 
     // Render a specific page into the canvas, in a specific rectangle.
     bool renderPage(int page, SkCanvas* canvas, const SkRect& dst) const;
 
     // Returns the number of pages in the loaded pdf.
     int pages() const;
 
     // Returns the MediaBox of a page. Can be used by client to crate a canvas.
     SkRect MediaBox(int page) const;
 
     // TODO(edisonn): for testing only, probably it should be removed, unless some client wants to
     // let users know how much memory the PDF needs.
     size_t bytesUsed() const;
 
 private:
     // Takes ownership of SkPdfNativeDoc.
     SkPdfRenderer(SkPdfNativeDoc*);
     SkPdfNativeDoc* fPdfDoc;
 };
 
 // For testing only, reports stats about rendering, like how many operations failed, or are NYI, ...
 void reportPdfRenderStats();
 
 // Renders a page of a pdf in a bitmap.
+// Does not affect ownership of stream.
 bool SkPDFNativeRenderToBitmap(SkStream* stream,
                                SkBitmap* output,
                                int page = 0,
                                SkPdfContent content = kAll_SkPdfContent,
                                double dpi = 72.0);
 
 // TODO(edisonn): add options to render forms, checkboxes, ...
 // TODO(edisonn): Add API for Forms viewing and editing
 // e.g. SkBitmap getPage(int page);
 //      int formsCount();
 //      SkForm getForm(int formID); // SkForm(SkRect, .. other data)
 // TODO (edisonn): Add intend when loading pdf, for example: for viewing, for parsing content, ...
 
 #endif  // SkPdfRenderer_DEFINED