Add live mode detection in WebM MediaSource parser.

media/formats/webm/webm_video_client.cc

Index: media/formats/webm/webm_video_client.cc
diff --git a/media/formats/webm/webm_video_client.cc b/media/formats/webm/webm_video_client.cc
index 5ea398ef06ffdaf84aef15f195cce3909cbb5076..1bbf597aefb434b61c6dfa0181478fb01ebd348f 100644
--- a/media/formats/webm/webm_video_client.cc
+++ b/media/formats/webm/webm_video_client.cc
@@ -30,9 +30,11 @@ void WebMVideoClient::Reset() {
   alpha_mode_ = -1;
 }
 
-bool WebMVideoClient::InitializeConfig(
-    const std::string& codec_id, const std::vector<uint8>& codec_private,
-    bool is_encrypted, VideoDecoderConfig* config) {
+bool WebMVideoClient::InitializeConfig(const std::string& codec_id,
+                                       const std::vector<uint8>& codec_private,
+                                       bool is_encrypted,
+                                       bool live_mode,
+                                       VideoDecoderConfig* config) {
   DCHECK(config);
 
   VideoCodec video_codec = kUnknownVideoCodec;
@@ -98,7 +100,7 @@ bool WebMVideoClient::InitializeConfig(
 
   config->Initialize(
       video_codec, profile, format, coded_size, visible_rect, natural_size,
-      extra_data, extra_data_size, is_encrypted, true);
+      extra_data, extra_data_size, is_encrypted, live_mode, true);
   return config->IsValidConfig();
 }