Fire CanPlayThrough immediately for local and streaming media files

media/base/filters.h

Index: media/base/filters.h
diff --git a/media/base/filters.h b/media/base/filters.h
index e464202036a5b92a305c1dcaf585681a971cd1b1..09b32774006c45ae79d430f998daa74a9a86f1c0 100644
--- a/media/base/filters.h
+++ b/media/base/filters.h
@@ -157,6 +157,10 @@ class MEDIA_EXPORT DataSource : public Filter {
   // Notify the DataSource of the bitrate of the media.
   // Values of |bitrate| <= 0 are invalid and should be ignored.
   virtual void SetBitrate(int bitrate) = 0;
+
+  // Returns true if the data source is from a local file or stream (such as a
+  // webcam stream), false otherwise.
+  virtual bool IsLocalSource() = 0;

[acolwell GONE FROM CHROMIUM, 2011/11/30 19:26:11]

I wonder if adding this method is needed since the implementations for the 2
DataSource implementations are very similar and are both scheme based. 

What do you think about adding the URL scheme checks to FFmpegDemuxerFactory and
just pass the local_source value to FFmpegDemuxer's constructor? I believe this
should work since I don't think it is valid for HTTP to redirect to file: or
data: URLs

[vrk (LEFT CHROMIUM), 2011/12/01 02:11:35]

Yeah, that's what I was thinking too. Done.

 };
 
 class MEDIA_EXPORT VideoDecoder : public Filter {