rewind at the start of each FontStream api (since we rewinding internally anyway)

trunk/src/core/SkFontStream.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 SkFontStream_DEFINED
 #define SkFontStream_DEFINED
 
 class SkStream;
 
 #include "SkTypeface.h"
 
 class SkFontStream {
 public:
+    /**
+     *  Note: the stream is rewound initially, but is returned at an arbitrary
+     *  read offset.
+     */
     static int GetTableTags(SkStream*, SkFontTableTag tags[]);
+
+    /**
+     *  Note: the stream is rewound initially, but is returned at an arbitrary
+     *  read offset.
+     */
     static size_t GetTableData(SkStream*, SkFontTableTag tag,
                                size_t offset, size_t length, void* data);
 };
 
 #endif