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..57a098d6899ba4dcff4e5b118da5644498a49304 100644
--- a/media/filters/ffmpeg_demuxer.cc
+++ b/media/filters/ffmpeg_demuxer.cc
@@ -287,7 +287,8 @@ FFmpegDemuxer::FFmpegDemuxer(MessageLoop* message_loop)
       max_duration_(base::TimeDelta::FromMicroseconds(-1)),
       deferred_status_(PIPELINE_OK),
       first_seek_hack_(true),
-      start_time_(kNoTimestamp) {
+      start_time_(kNoTimestamp),
+      local_source_(false) {
   DCHECK(message_loop_);
 }
 
@@ -539,6 +540,8 @@ void FFmpegDemuxer::InitializeTask(DataSource* data_source,
   if (bitrate > 0)
     data_source_->SetBitrate(bitrate);
 
+  local_source_ = data_source_->IsLocalSource();
+
   callback.Run(PIPELINE_OK);
 }
 
@@ -571,6 +574,10 @@ int FFmpegDemuxer::GetBitrate() {
   return 0;
 }
 
+bool FFmpegDemuxer::IsLocalSource() {
+  return local_source_;
+}
+
 void FFmpegDemuxer::SeekTask(base::TimeDelta time, const FilterStatusCB& cb) {
   DCHECK_EQ(MessageLoop::current(), message_loop_);