Fire CanPlayThrough immediately for local and streaming media files

media/filters/ffmpeg_demuxer.cc

Index: media/filters/ffmpeg_demuxer.cc
diff --git a/media/filters/ffmpeg_demuxer.cc b/media/filters/ffmpeg_demuxer.cc
index 0c63fde53f090fb6e2f52ca8ba2d4aec1578eb5c..e33bada6f1b74043169fdedf0510b91856949267 100644
--- a/media/filters/ffmpeg_demuxer.cc
+++ b/media/filters/ffmpeg_demuxer.cc
@@ -277,8 +277,9 @@ base::TimeDelta FFmpegDemuxerStream::ConvertStreamTimestamp(
 //
 // FFmpegDemuxer
 //
-FFmpegDemuxer::FFmpegDemuxer(MessageLoop* message_loop)
+FFmpegDemuxer::FFmpegDemuxer(MessageLoop* message_loop, bool local_source)
     : message_loop_(message_loop),
+      local_source_(local_source),
       format_context_(NULL),
       read_event_(false, false),
       read_has_failed_(false),
@@ -571,6 +572,14 @@ int FFmpegDemuxer::GetBitrate() {
   return 0;
 }
 
+bool FFmpegDemuxer::IsLocalSource() {
+  return local_source_;
+}
+
+bool FFmpegDemuxer::IsSeekable() {
+  return !IsStreaming();
+}
+
 void FFmpegDemuxer::SeekTask(base::TimeDelta time, const FilterStatusCB& cb) {
   DCHECK_EQ(MessageLoop::current(), message_loop_);