When we read from a RemoteFontStream (might happen maybe with other streams), stream's data might b…

src/ports/SkFontHost_fontconfig.cpp

Index: src/ports/SkFontHost_fontconfig.cpp
===================================================================
--- src/ports/SkFontHost_fontconfig.cpp	(revision 8280)
+++ src/ports/SkFontHost_fontconfig.cpp	(working copy)
@@ -247,6 +247,13 @@
 static SkStream* open_stream(const FontConfigTypeface* face, int* ttcIndex) {
     SkStream* stream = face->getLocalStream();
     if (stream) {
+        // TODO: fix issue 1176.
+        // As of now open_stream will return a stream and unwind it, but the
+        // SkStream is not thread safe, and if two threads use the stream they
+        // may collide and print preview for example could still fail,
+        // or there could be some failures in rendering if this stream is used
+        // there.
+        stream->rewind();
         stream->ref();
         // should have been provided by CreateFromStream()
         *ttcIndex = 0;