Add live mode detection in WebM MediaSource parser.

media/base/test_helpers.cc

Index: media/base/test_helpers.cc
diff --git a/media/base/test_helpers.cc b/media/base/test_helpers.cc
index fd571ddc689c43eda8c746c248540bff64143af7..2d0a2b8f7b73611162c4bc568822dded8add0081 100644
--- a/media/base/test_helpers.cc
+++ b/media/base/test_helpers.cc
@@ -114,7 +114,7 @@ static VideoDecoderConfig GetTestConfig(VideoCodec codec,
 
   return VideoDecoderConfig(codec, VIDEO_CODEC_PROFILE_UNKNOWN,
       VideoFrame::YV12, coded_size, visible_rect, natural_size,
-      NULL, 0, is_encrypted);
+      NULL, 0, is_encrypted, false);
 }
 
 static const gfx::Size kNormalSize(320, 240);