update dox
git-svn-id: http://skia.googlecode.com/svn/trunk@1720 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/pdf/SkPDFStream.h b/include/pdf/SkPDFStream.h
index a975ad6..739177f 100644
--- a/include/pdf/SkPDFStream.h
+++ b/include/pdf/SkPDFStream.h
@@ -32,7 +32,8 @@
class SkPDFStream : public SkPDFDict {
public:
/** Create a PDF stream. A Length entry is automatically added to the
- * stream dictionary.
+ * stream dictionary. The stream may be retained (stream->ref() may be
+ * called) so its contents must not be changed after calling this.
* @param stream The data part of the stream.
*/
explicit SkPDFStream(SkStream* stream);